Wednesday, October 9, 2019

Cognitive Dissonance Classic in Psychology

Cognitive Dissonance Classic in Psychology Areej Alemer [Instructor’s Name] [Class Title] Cognitive Dissonance Classic in Psychology Introduction There were famous experiments conducted in psychology and many of these experiments gave scientists a new perspective on understanding people. In the 1950s, scientists began conducting test about the effect of social pressures and influence to the behavior of people. Among these scientists is Leon Festinger. He became a well known scientist about the topic social influence through his famous theory of cognitive dissonance[1].Cognitive Dissonance Festinger came about this theory in the 1950s at a time when a doomsday cult attracted media attention. The cult worshipped a certain god named Sananda. Cult members believed that Sananda gave them these warnings The uprising of the Atlantic bottom will submerge the land of the Atlantic seaboard; France will sink†¦. Russia will become one great sea†¦ a great wave rushes to the Rock y Mountains†¦ for the purpose of purifying it of the earthling and creating a new order. [2] Believers claimed that these warnings would happen in midnight of December 21.Festinger got interested with the cult and in his mind he had these questions: â€Å"What would happen when on the midnight of December 21, nothing happens? Would the group lose faith? How do human beings react when prophecy fails? †[3] Festinger found out that when the prophecy failed the believers did not lose their faith. They found ways to justify the failed prophecy. One of famous explanation was earth was spared because the cult members went into action and believed in the prophecy. Christians and Jews will find this justification not hard to believe.In the book of Jonah in the bible, Jonah prophesied that Nineveh would be destroyed by fire (Jo. 3:1-10). The people of Nineveh believed and decided to fast and put on sackcloth to show that they had repented. Even their king fasted, sat on ashes and put on sackcloth. Eventually Nineveh was spared and destruction did not happen. So when cult leaders told their members that the earth was spared because of believing Sananda's message, the members bought it, but not Festinger. To him the explanations are a bunch of lies, which he politely called â€Å"cognitive dissonance. Festinger saw the effort of cult leaders in lyng to the media in making excuses to their failed prophecy. They contacted TV stations ABC and CBS, they welcome New York Times, the phoned the writers of Life, Time and Newsweek and gave dozens of interviews to reporters. [4] These actions according to Slater were â€Å"attempts to convince the public that their actions and beliefs were not in vain. † The attempts of cult leaders to justify their actions and beliefs became the basis of Festinger’s theory and experiments on cognitive dissonance[5].Through his readings about history, people tend to proselytize (a sort of desperate defense mechanism) when their belief is disconfirmed. He also found out that the â€Å"disjunction between what one believes and the factual evidence is highly uncomfortable. †[6] When prophecy of a cult fails members would attempt to convince everyone to join the cult through false justification. The more people join the group, the more the members feel that they were not mistaken. Is it possible for people to engage in extreme lying just to reconcile their seemingly irreconcilable ideas?Festinger found out that people indeed lie in order to avoid dissonance. In fact, he discovered several forms of dissonance. According to Cooper , what Festinger observed in the cult, he called it the belief disconfirmation paradigm[7]. When he conducted experiment regarding dissonance and money, he called it the insufficient reward paradigm. In his last research he also identified another dissonance- induce compliance paradigm[8]. To understand cognitive dissonance theory it is important to review Festingerâ€⠄¢s experiment. The ExperimentBut to be able to explain Festinger’s experiment and his theory of cognitive dissonance, discussion of the actual experiment is necessary. Festinger’s experiment is considered a classic in psychology and can easily be retrieved in the net. It was first published in the Journal of Abnormal Psychology and was entitled â€Å"Cognitive Consequence of Forced Compliance. † The experiment objective is to investigate how cognitive dissonance takes place when people are force to comply. Slater simply called cognitive dissonance as â€Å"irreconcilable ideas†[9].Social Psychology authors such as Brown simply defined cognitive dissonance as a state of opposition between cognition such as beliefs, views and opinion[10]. It is a perceived inconsistency within a person’s mental processes, in which he believes in something then acts in a different way from what he believes. Festinger exp[11]eriment aimed to measure the cognitive diss onance effect during force compliance and to test the validity of the following two statements: â€Å"If a person is induced to do or say something, which is contrary to his private opinion, he tends to change his opinion to bring congruence to what he has done or said. and â€Å"The larger the pressure used to elicit the overt behavior (beyond the minimum needed to elicit it) the weaker will be the above-mentioned tendency†) Festinger and his colleagues hypothesized that the larger the reward the lesser would be the subsequent opinion change. Therefore, if one puts their words in research method statements, the main hypothesis would be â€Å"there is a significant relationship between the amount of rewards and the magnitude of cognitive dissonance†[12]     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  To test the validity of the hypothesis, Festinger divided his subjects into three groups, one controlled group and two experimental groups.The two experimental groups are named- one-dollar g roup and twenty-dollar group respectively, the name correspond to the amount of money that the two groups will received in order to comply. The subjects for the experiment were college students and the primary technique utilized by the researcher was deception. The subjects were told that the experiment is about their behavior on a monotonous activity. However, the real experiment would only begin when the researcher tries to deceive them, by telling another group will be exposed to a variable in which a confederate will tell them that the activity is enjoyable.However, the original confederate will not come and that the experimenter needs the respondents to act as proxy and be the one to tell lies to the other subject (who herself is also a confederate) on the other room. The persuasion involves a monetary reward a one-dollar for the first group and a twenty-dollar for the other. The rewards are  intended to affect the subject’s behavior or the dissonance effect. Deception was not included in the control group to be able to control its effect. The first experimental group receives a one-dollar amount in order to tell lies. The other experimental group receives 20 dollars.The authors theorized that the one-dollar group would have a greater magnitude of dissonance compared to the 20 dollars group[13]. By applying statistical treatment and comparing the responses of the experimental group with the control group the researcher found out that the one dollar group came to believe that the experiment as enjoyable where in fact, the control group finds it extremely boring, the twenty dollar group find the experiment slightly boring not far from the control groups answer. These results support the theory that the smaller the award the greater is the magnitude of the dissonance.Hence the authors accepted the hypothesis. Festinger’s experiment also has limitations. It is only limited to the response of the subjects who were mostly college students. The r esults might be different if conducted on professionals and middle age adults. Impact of the Experiment to Psychology Festinger’s findings were considered a milestone in psychology. It gave convincing explanations to mysterious human behaviors. Gawronski[14] provided an example. During the Korean War she wrote, the Chinese were able to convince American prisoners to become communists.They did this not by torture but by offering a bit of rice or candies. In exchange of these goodies, Americans were asked to write an anti-American essay. After the essay writing many American soldiers espoused communism. Ordinary people might find such behavior baffling and stupid. Why throw democratic principles in exchange of a bit of rice? It would be easy to accept that these Americans were tortured and went through a near death experience that is why they converted to communism. It is a rational explanation and very acceptable. The fact that Americans embraced communism for a candy is somet hing people could not accept.Cognitive dissonance theory provided an answer- the simpler the reward for engaging in behavior that is contrary with one’s beliefs, the higher the tendency of the person to change his or her beliefs[15]. Even though this answer seems to make no sense, it really happens. The one and twenty dollar experiment supported it. According to Petty, there is a rational explanation for changing one’s belief. It was such a horrible thing to sell one’s self for a piece of candy[16]. The emotional pain would be so great. The person may lose his feeling of self-worth and may look at himself an undignified individual.Slater coined this feeling a â€Å"schmuck. To avoid such a feeling, the person should come up with a better explanation for selling his principles for a very cheap price. Festinger’s theory provided an alternative explanation for behaviorism. Formerly Skinner had said rewards reinforce and punishments extinguish. Skinner expla ined human behavior through his reward theory. Humans operate in their environment and through this operation they learn certain behaviors. Humans acquire behavior through operant conditioning. Skinner took away the mental element of humans. He made humans simple machines that behave through the means of conditioning.After cognitive dissonance theory, humans were seen as punishment driven beings that act not because of conditioning but because of mental processes. Festinger added the element of thoughts in explaining human behavior. His theory challenges the behaviorism. Behaviorism claimed that mind and thoughts are not worthy of psychological investigations because they belong to the realms of philosophy and not empirical science. Festinger discovered that behavior is influenced by the way people think. Psychologists cannot set aside the mind and thought processes in explaining human behavior.Without considering the mind and thought processes, psychologists would never understand why American soldiers embraced communism in exchange for a piece of candy or a bit of rice. Human beings are not only motivated by rewards and punishment. For, if this were so, the Chinese will have a hard time convincing Americans to espouse communism because their offer of rewards were not actually rewarding. Festinger has drawn a concrete conclusion from his cognitive dissonance theory. Human are hypocrite beings. They are beings motivated by minds that must be made comfortable.Reward theory alone can never explain human behavior. Human beings think. They engage in the most amazing mental gymnastics, all just to justify their hypocrisy[17]. Explaining Mysterious Human Behavior Cognitive dissonance theory is not only an elegant explanation for mysterious human behavior. It is also became a tool to discredit religion especially Christianity. Using the belief – disconfirmation paradigm, one can conclude that the spread of Christianity was due to cognitive dissonance and lack of deep knowledge of human behavior during the early years of Christianity.Everybody knows for a fact that Christianity spread through the effort of Jesus’ disciples. Ancient critics of Christianity suspected that early Christians had engaged in mass hysteria[18]. They collectively had seen unreal things. Before, cognitive dissonance theory, such accusation of mass hysteria was dismissed because of the martyrdoms of virtually every apostle of Christ. The apostle would not sacrifice their lives for something that is founded by fallacy. They were burned at the stake, cut into two, crucified upside down and immersed in boiling oil all because they refused to decant their faith.To avoid such horrible tortures, all they had to do was to tell the emperor that they there were no truths in their claims about Jesus and presto they will be released. But they chose death, indicating that they were not under mass hysteria but had really seen Christ resurrects from the death. This is a si mple Christian defense; it stood unchallenged for thousands of years until Festinger discovered cognitive dissonance. Cognitive dissonance explained that when prophecy fails, people will not leave their beliefs instead, they would create lies in order to justify the failed prophecy perhaps even to the point of death [19]. The apostles of Christ were expecting him to free Israel from bondage. This is the duty of the messiah. They expect Jesus to liberate Israel and establish a new Jewish kingdom. The apostles believed that Jesus was the messiah. They gave up everything in order to become Jesus’ disciples. They were promised to receive an important position in Jesus kingdom. They expect that the earth will be destroyed by fire and a new heaven and earth will be created. The kingdom of Jesus will be established in this new heaven and earth. The apostles will co rule with Jesus. But Jesus was killed and everything that they have believed turned to ashes.Some left Jerusalem and st arted a new life. Others were left and continue to meet secretly. This gathering can be likened to the case of the doomsday cult, in which members did not go home and confessed their mistakes; instead, they change their behaviors, speeches and way of thinking to explain carefully their failed prophecy. They began attracting more followers despite of the fact that their prophecy failed. They engaged in pathological lying just to convince people that they were not wrong. If ordinary people in the doomsday cult had engaged in lying when prophecy failed, then it was also possible that the apostles had also lied.Cognitive dissonance theory states that it was possible for the apostles not to recant their faith even until death. Hence, Christianity martyrdom defense is weak. After his death, his apostles claim that Jesus is coming very soon and judgment day is at hand. Like in the case of the doomsday cult, believers also had sold their belongings and give the money to the apostles. The ap ostles have all died but judgment day did not come. Despite of these, believers became more aggressive in recruiting new members and Christianity grew in numbers. Two thousand years have passed but Christ did not return and judgment day was nowhere to be found[20].Yet, Pastors and priest were able to find plausible explanation for the delayed second coming and people really buy it. No offense to Christian readers, but after reading chapter five and Festinger’s original study, it was very hard for this writer not think that cognitive dissonance was really involved in Christianity. Cognitive dissonance is not just a simple social psychology experiment. It is a mind opener, a myth buster and a truth engine. If religious fanatics explore its basic concepts, they might leave their faith. Cognitive dissonance theory explained that humans would lie in order to avoid dissonance.It is the best explanation why religious cults and organizations do not cease to exist even though their pr ophecy and beliefs fails or contradicts reasoning. Festinger’s theory is all about the tendency of humans to lie to avoid discomfort. It is about the selfishness of human nature. This is the only conclusion one can derive from his experiments. Humans are hypocrites and engage in all sort of mental gymnastic in order to justify their hypocrisy. Conclusion Slater believed in cognitive dissonance theory but disagree with Festinger’s revelation on the selfishness of human nature.Do humans lie because of selfish motive, i. e. to avoid the pain of being a â€Å"schmuck† or was there something else. Festinger forgot to mention the good side of human nature. All he saw was its tendency to deceive and lie[21]. To show that dissonance is caused by other elements aside from selfishness, Slater told a story about Linda Santo. Linda Santo has a bed-ridden daughter named Audrey whom she takes care of for the past couple of decades. Her daughter got an accident when she was th ree and became bed ridden from that time on. Linda patiently took care of his daughter since then.Her husband left her a few months of the accident. Linda took care of Audrey. Audrey though invalid is a miracle worker, Statues of Mary and Jesus were put near her and these statues produce miracle oil. The oil was used to heal sickness of any kind. Linda finds an explanation and was not mystified with the miracles. She knew that her daughter was a â€Å"saint, that God had chosen Audrey to be a victim soul, to take on the pains of other people so that they could be healed (121)† It’s a classic example of cognitive dissonance, the mother finding an explanation for her daughter’s dreadful fate.It was not clear whether Linda manipulate the miracles and told people that her daughter takes away people pains. But according to Slater , if ever she lied, there was no selfishness in her heart, but love, which makes Festinger view of human nature somewhat wrong. People do n ot lie only because they avoid of being a schmuck but also because they are loving creatures. Linda was found to have breast cancer. She regularly underwent therapy. She now takes care of herself alone aside from taking care of her daughter. Slater wondered why Linda would not ask her daughter to heal her.Perhaps she knew that the miracles were a fake. She simply told Slater that mothers do ask something from their child; it is they who give something to their child. Slater concluded that dissonance is not always about selfishness; it’s also about love. Slater was a mother and understands very well why Linda was doing all this[22]. Perhaps, there is another form of cognitive dissonance paradigm that Festinger failed to identity. To conclude, Festinger experiments were indeed convincing but he failed to consider the other aspect of human nature such as love and caress.Some people engage in dissonance not because of cognitive pain but because out of love just in the case of Lin da Santo. Bibliographies Brown, Richard, Social Psychology 5th Edition New York McGraw Hill. 2006. Cooper, John. Cognitive dissonance: 50 years of a classic theory. London: Sage publications. 2007. Gawronski, Brand. Cognitive consistency: A fundamental principle in social cognition. New York: Guilford Press. 2011. Myers, Steven. Social psychology  . Toronto: Graw-Hill Ryerson. 2006. Petty, Ronald . The Meta-Cognitive Model (MCM) of attitudes: Implications for attitude measurement, change, and strength.Social Cognition. 2007. 25(5), 657686. Chen Mark Revisiting the Three Choice Paradigm Journal of Personality and Social Psychology 2010. 99(4), 573. Slater, Laura Opening Skinner’s Box New York, Penguin Books. 2005. ———————– [1] Myers, Steven. Social psychology  . (Toronto: Graw-Hill Ryerson, 2006) 90-120 [2] Slater, Laura Opening Skinner’s Box (New York, Penguin Books, 2006) 110 [3] Ibid 111 [4] Cooper, John. Co gnitive dissonance: 50 years of a classic theory. (London: Sage publications, 2007). 90 [5] Slater, Laura Opening Skinner’s Box (New York, Penguin Books, 2006) 111 [6] Cooper, John.Cognitive dissonance: 50 years of a classic theory. (London: Sage publications, 2007). 91 [7] Cooper, John. Cognitive dissonance: 50 years of a classic theory. (London: Sage publications, 2007). 90 [8] Petty, Ronald . The Meta-Cognitive Model (MCM) of attitudes: Implications for attitude measurement, change, and strength. Social Cognition, 2007. 25(5), 657–686. [9] Cooper, John. Cognitive dissonance: 50 years of a classic theory. (London: Sage publications, 2007). 92 [10] Brown, Richard Social Psychology 5th Edition (New York McGraw Hill, 2006) 91 [11] Slater, Laura Opening Skinner’s Box (New York, Penguin Books, 2006) 115 [12] Cooper, John.Cognitive dissonance: 50 years of a classic theory. (London: Sage publications, 2007). 99 [13] Myers, Steven. Social psychology  . ( Toronto:Gra w-Hill Ryerson, 2006) 95 [14] Gawronski,Brand. .  Cognitive consistency: A fundamental principle in social cognition. (New York: Guilford Press, 2011) 106 [15] Slater, Laura Opening Skinner’s Box (New York, Penguin Books, 2006) 114 [16] Petty, Ronald . The Meta-Cognitive Model (MCM) of attitudes: Implications for attitude measurement, change, and strength. Social Cognition, 2007, 25(5), 658. [17] Petty, Ronald .The Meta-Cognitive Model (MCM) of attitudes: Implications for attitude measurement, change, and strength. Social Cognition, 2007. 25(5). [18] Myers, Steven. Social psychology  . (Toronto: Graw-Hill Ryerson, 2006) 99 [19] Brown, Richard Social Psychology 5th Edition (New York McGraw Hill, 2006) 91 [20] Chen Mark Revisiting the Three Choice Paradigm Journal of Personality and Social Psychology. 2010. 99(4), 573. [21] Slater, Laura Opening Skinner’s Box (New York, Penguin Books, 2006) 125 [22] Slater, Laura Opening Skinner’s Box (New York, Penguin Books, 2006) 150

Tuesday, October 8, 2019

Facilitate your personal development Essay Example | Topics and Well Written Essays - 1000 words

Facilitate your personal development - Essay Example 1. CONSISTENCY Consistency is a very important element to maintain our output while working. One can only do it by periodically checking of his or her performance. For example, we can maintain a diary from the moment we start our work. Say every week, we check our performance whether it is increasing or decreasing. If decreasing, what is the reason behind it? We are our best judge. No one knows you better than you yourself. So you are you best teacher. One easy way of accomplishing tasks can be done by breaking it into smaller segments. By checking ourselves time to time we can ensure and maintain our optimum performance. Use hand written task checklists in which each step has to be ticked off to ensure consistency in method of task completion. (Gurcheik, 2012) Having a white board in the work area with all relevant work information is a one good method of maintaining your consistency. Another way to check yourself would be to ask your supervisor as how is your performance, whether t here is improvement or not. If not what are the areas where you need to improve. 2. TRAINING No one is perfect; we all know it and we should always accept it. In order to train oneself, the person needs to know his or her strengths and weaknesses first. Doing SWOT analysis (Strength, Weakness, Opportunity & Threats) of oneself is very helpful in this situation. Once we do that we will realize our weaknesses we need to find out how to overcome these. All employees with duty for performance management must receive training to help them manage performance effectively. This should include information on the objectives of performance management, how it will operate and what their role will be. Employees will also need training in how to set their objectives and training in other aspects of the system. (Garger, 1999) We can always take help from our colleagues or our seniors. Being honest with our own self will always be helpful in improving ourselves. We need to start concentrating on ou r weaknesses and gradually overcoming these. 3. RECORD KEEPING As discussed in the first topic of consistency, one needs to maintain a diary to keep a check on the evaluation, in the similar fashion we also need to record our improvement. Unless and until we know the progress we will not be able to judge our improvement. It is very important to understand and know whether our training is actually helping us improve or not. A small example can be, whether we being able to meet our daily targets or we are exceeding our targets. (Gurcheik, 2012) 4. KEEPING EXPECTATION HIGH Each and every company has a performance management process. We all know it. This is no secret. But we need to make sure that we are confident in ourselves that we have the capability to improve. As it is said self motivation is the best motivation. The company will eventually lay down the process for you, but we need to be ready with a positive attitude towards it. As quoted, â€Å"Everything that is â€Å"rewardi ng† about working for a particular employer or everything an employee gets as a result of their employment† (Davis, 2007). This statement is very true because at the end of the day it is a mutual understanding between the employee and the employer. The company wants us to perform and this is their way to help ourselves improve and perform better. Let us be positive about it. (Boyett & Jimmy, 2000) If

Monday, October 7, 2019

Family Research Paper Example | Topics and Well Written Essays - 2500 words

Family - Research Paper Example As stated above, Sami suffers from chronic bronchial asthma, which was discovered at birth.Mohammed used to suffer from asthma;however, it disappeared many years ago.Besides following their family doctor's orders in Saudi Arabia, the parents were treating their child with a well-known type of herb, called Magr in Arabic, which is believed to improve asthma.When they travelled to Australia, they had to change their doctor and stop using the traditional treatment.Sami's case intensified when they arrived in Australia, which worried his parents very much.However, their doctor told them that this was a result of the change of environment.He advised them to live in a house without trees around which were found to increase the severity of Sami's asthma.They also took great care of their child during winter, when he gets more affected.In addition, they deal carefully with fumes and odours such as perfumes.Above all, they were assured by their doctor that Sami's case will improve as he gets older. According to Wright and Leahey (2005), the proper way in which the family will be evaluated is to use the Calgary Family Assessment Model (CFAM). The CFAM categorizes the family assessment into three main sections, namely, structural, developmental, and functional assessments, each of which are addressed separately below. IV.STRUCTURAL ASSESSMENT. The sub-dimensions of internal structure, external structure, and context are explicated by the following categories (Wright & Leahey, 2005). Internal Structure: The internal structure covers the categories of the composition of the family, the gender of the people in the family, the parents' sexual orientations, the rank order, the family's sub-systems, and the personal boundaries of the family members. Family Composition. Mohammed's family is a nuclear family consisting of the father, the mother, and two offspring. They are married under Shari'a, or Islamic law. They still kep in contact with their respective families. When they were in Saudi Arabia, Mohammed's parents were living in the same house as his family. Gender. The fact that Mohammed is a man and

Sunday, October 6, 2019

Display design for or a museun, gallery, shop ,church, palace or Essay

Display design for or a museun, gallery, shop ,church, palace or temporary exhibition - Essay Example Furthermore, of the ethnic groups named in the Hall of Kenya and the Cycle of life gallery, the emphasis is on the Maasai ethnic group. This appears to be a deliberate attempt to please foreign tourist market given that it resonates well with Kenya’s tourism sector’s extensive use of Maasai imagery and artifacts in advertisements. The foreign tourist market is important for the museum given that tourist pay eight times more than what ordinary citizens of Kenya pay at the entrance as fee in order to gain access to the museum. In addition, the tourist pays U.S. $100 to view the original hominid skeletal remains in the Cradle of Mankind gallery’s section (JURMAIN, 2008.p.6). The Cycle of Life exhibits consists of artifacts associated with stages of life in the history of traditional and modern Kenya. Like the photographs and paintings in the Hall of Kenya, the artifacts here, also carry ethnic identities as the overriding motive of display. Pictorial exhibit in the national museum as part of Kenya’s 10th independence anniversary celebration display is political because they are used in highlighting the various developments in the history of Kenya since independence. These developments were responsible for shaping the history of the nation through the various stages of struggle up to independence. The pictorial exhibits are used by government and the museum to give citizens the opportunity to learn, appreciate and experience the efforts and struggles made by the government and other institutions in the social, political and economical development of Kenya as a young country. An example of this exhibition was the 17th December 2013 which showcased the political struggles of various individuals and their contributions towards Kenya’s independence. In addition, the pictorial exhibits are being used to celebrate Kenya’ Jubilee year. It is a celebration which given due

Saturday, October 5, 2019

Discern the legal realtionships between landlords and tenants Essay

Discern the legal realtionships between landlords and tenants - Essay Example States normally ask for notices when a tenant decides to evict, vacate, repair or lease violations/charges (Maillard, 2008). The aim of these requirements is to form written records of fees, requests and events associated with the property that might cater as evidence in a court of law. When a tenant or the person, who has rented the house, dies any funds owed between the landlord and the tenant has to be determined by the tenants estate. Estate matters are settled through probate. This refers to the legal or lawful procedure through which a dead persons property is settled, as well as transferred, to new owners (Maillard, 2008). The Landlord and Tenant probate laws differ in different states. Therefore, when such a case arises, it is essential to talk to a lawyer in your state when you need legal advice regarding rents when a tenant dies (Maillard, 2008). In this matter of Ann, Ted should refund Ann’s security to her designated representative. Even though, the rule of probate differs in almost every state, in the United Sates, this is the universal reference in case such a matter

Friday, October 4, 2019

Annotated Outline and Bibliography Assignment Example | Topics and Well Written Essays - 500 words

Annotated Outline and Bibliography - Assignment Example Criminal psychopaths engages in severe antisocial behavior, such as serial murder, animal cruelty, or sexual crimes while non-criminal have their manifestation of their pathology limited to non-criminal acts such as cheating or lying. On the other hand, antisocial personality disorder is a form of chronic mental condition in which an individual’s ways of thinking, perceiving situations and interaction with others are dysfunctional and destructive (Andrews & Bonta,2010). Victims of this condition shows no regard for right and wrong and often disregard the rights, wishes and feelings of others while general criminal involves deliberate contravention of the state law. Ted Bundy qualifies to be identified as a psychopathic serial predator due to his deceitful and well organized tactics of luring, killing and evading the law. It is important to note that criminal psychopathy is reflected in behavior such as substance abuse, sex addiction, drug addiction, addiction to gambling among other related compulsive behaviors. On the other hand, on-criminal psychopaths exhibit mild compulsive behavior such as internet addiction, procrastination, television watching (Dekle,2011). In regard to these concepts, the case of Bundy can be classified as criminal psychopathy due to his addiction to sex related crimes. In connection with the case of Bundy, Criminal profiling can be seen as an act of developing a psychological profile of an offender based on the state of the crime scene. This is always carried out by the forensic psychologist. This differs with other forensic evaluation procedures in that it crime scene helps to label the perpetrator as organized, disorganized, or mixed and the investigator uses this to study the behavior of the culprit for possible prosecution. The meticulous plan of Bundy in his many cases of crimes could only be managed by this method of

Thursday, October 3, 2019

Heat of Combustion Essay Example for Free

Heat of Combustion Essay Mapua Institute of Technology School of Chemical Engineering and Chemistry Physical Chemistry I Experiment No. 6 Heat of Combustion Alain John Cantaa, Jefunnie Matahumb, Marife Comprac, Nino Adrian Rodelasa, a b Bachelor of Science in Chemical Engineering, Mapua Institute of Technology, School of Chemistry and Chemical Engineering Bachelor of Science in Biological Engineering and Chemistry, Mapua Institute of Technology, School of Chemistry and Chemical Engineering c Bachelor of Science in Chemistry and Chemical Engineering, Mapua Institute of Technology, School of Chemistry and Chemical Engineering Heat of combustion Calorimeter Aromaticity Relative energies Heat of formation Date submitted: March 02, 2013 ABSTRACT The heat of combustion, ? H, can be measured through a bomb calorimeter. It is the energy released as heat when a compound undergoes complete combustion with oxygen under standard conditions. The chemical reaction is typically a hydrocarbon reacting with oxygen to form carbon dioxide, water and heat. It may be expressed with the quantities: energy/mole of fuel (kJ/mol), energy/mass of fuel, energy/volume of fuel. The heat of combustion is conventionally measured with a bomb calorimeter. It may also be calculated as the difference between the heat of formation of the products and reactants. The experiment aimed to determine the heat of combustion of some hydrocarbons namely, benzoic acid, naphthalene, and sucrose and to be familiarized with calibration of bomb calorimeter. Parr 6200 Bomb Calorimeter, a device that measures heat of combustions of different compounds, and the Parr 6510 water handling system were used. The samples used were benzoic acid, naphthalene and sucrose. The results of the experiment showed that naphthalene has the highest heat of combustion followed by benzoic acid and sucrose, respectively. The analysis of the molecular structure of the samples found that increasing aromaticity of compounds yield to a higher enthalpy of combustion. Discussion of the relative energies of the bonds broken in combustion had contributed to the overall concept of the experiment. In general, the heat of combustion of a certain compound can be measured in a typical bomb calorimeter and aromaticity is directly proportional to the heat of combustion of a particular compound. . Introduction Combustion is the chemical term for a process known more commonly as burning. It is one of the earliest chemical changes noted by humans, due at least in part to the dramatic effects it has on materials. 1The mechanism by which combustion takes place is well understood and is more correctly defined as a form of oxidation. This oxidation occurs so rapidly that noticeable 1 Charles E. Smith heat and light are produced. In general, the term oxidation refers to any chemical reaction in which a substance reacts with oxygen. For example, when iron is exposed to air, it combines with oxygen in the air. That form of oxidation is known as rust. Combustion differs from rust in that the oxidation occurs much more rapidly, giving off heat in the process. The first law of thermodynamics is the application of the conservation of energy principle to heat and thermodynamic process where the change in internal energy is equal to the difference in heat added and work done by the system. When a chemical reaction occurs in an open container most of the energy gained or lost is in the form of heat. Calorimetry is the study of the measure of heat of both physical and chemical reaction. In a constant-volume calorimeter, the heat measured, qv is simply the internal energy of the system for no expansion work is done at constant volume. A calorimeter is the device used for the process of calorimetry. 3 There are many kinds of calorimeters namely the bomb calorimeter, the calvet-type calorimeter, the isothermal calorimeter, the differential scanning calorimeter and the constant-pressure calorimter. Calorimeters can measure heat changes and as well as heat constants such as heat of formation and heat of combustion. Heat of combustion or Hc is the energy released when one mole of a compound is reacted with oxygen, forming carbon dioxide and water as end products. Theoretically, the heat of combustion can be calculated using the heat of formation of the products and reactants or using the bond enthalpies bonds formed and broken. One of the most widely used calorimeters today, is the bomb calorimeter. 4 A bomb calorimeter is a type of constant volume device which makes the system isolated from the surroundings. It is an excellent device in measuring heat of chemical processes including the heat of combustion. The bomb calorimeter is used to completely burn substances to produce water and CO2 in an excess of oxygen. The heat of combustion released is absorbed by the calorimeter vessel in which the bomb is immersed, and results in a temperature increase ? T. The temperature measuring device in the bomb calorimeter, measures the heat change in the water. The bomb calorimeter uses the following equation to measure heat changes. Q? ?t * e m [1] where Q is the energy involved, ? t is the change in temperature of the system, e is the energy equivalent of the calorimeter, and m is the mass of the sample. In this type, the heat measured for the sample burned at constant volume, qv is the change in internal energy of the substance from its initial to final states. 1The enthalpy change, (the heat of combustion for this process) is related to the internal energy, by the equation below. 2 3 Physical Chemistry 4th edition Atkins Physical Chemistry 8th edition 4 Principles of Chemical Engineering. 7th Edition Page 2 of 11 The enthalpy of combustion can be calculated from the temperature rise, which results when the combustion reaction occurs under adiabatic conditions in a calorimeter. It is important that the reaction in the calorimeter take place rapidly and completely. The objectives of the experiment were to setup and use a bomb calorimeter as well as to obtain the value of the heat of combustion of some hydrocarbons namely, benzoic acid, naphthalene, and sucrose using the bomb calorimeter. and electric heater and has a precision electronic thermometer. Temperatures are measured with a high precision electronic thermometer using a specially designed thermistor sensor sealed in a stainless steel probe which is fixed in the calorimeter cover. Measurements are taken with 0. 0001o resolution over a 20oC to 40oC working range, with all readings shown in Celsius. It has a semi-automatic system for charging the bomb with oxygen. Oxygen from a commercial cylinder is connected to a microprocessor controlled solenoid installed in the calorimeter. In filling the bomb, the filling hose connector slips onto the bomb inlet valve. The filling proceeds automatically at a controlled rate to a pre-set pressure. 5 2. Materials and Methods 2. 1 Equipments used The equipments used were Parr 6200 Bomb Calorimeter and Parr 6510 Water Handling System.