Heat of Fusion of Ice Discussion of Theory

Heat of Fusion of Ice Discussion of Theory Measuring the specific latent heat of fusion of water (ice): Introduction In our daily lives, heat can be found in everywhere. Cooking food heat is needed, it also makes people feel warm and produce more energy. Therefore to know the specific latent heat of fusion of water, both we need to know process of the heat was transferred and kinetic energy.The aim of this experiment was to find out the specific latent heat of fusion of water and steam. First of all, heat is a kind of energy, which transfers from one object to another because of their different temperatures. The SI unit of the specific latent heat is joule per kilogram (J kg-1). The specific latent heat of fusion which is the unit used to calculate the energy need to change unit mass of a substance from a solid into a liquid without in temperature. The equation Q=ItV=ML was used to calculate the energy needed from solid to liquid. Where Q is the heat supplied; m is the mass of the solid, L stands for the specific latent heat of fusion. However, in this process, first to be calculated the energy sup plied to the heater and divided it by the mass of ice melted by the heater to find the specific latent heat of fusion of ice. Next is the specific latent heat of vaporization, which was used to calculate how much heat energy for a substance need to change units of mass from liquid into vapour without in temperature. It also defined as the equation is Q=m lv +h â€Å"where lv represents the specific latent heat of vaporization of the liquid and h is the heat lost from the ‘jacket in time t†. Duncan (2000: 69). Finally, calorimeter is just a kind of equipment which uses to measure heat. There are some equations were use in the result calculation. The basic theory of the simple experiment is as above.MethodsPart.1 the specific latent heat of fusion of iceThe equipment of this experiment was two funnels and two barrels, an ammeter and a voltmeter supplied. Firstly, two funnels were filled with crushed ice, and then the heater was put in one of the funnels and left them both for five minutes. During these, the heater reached the temperature of the ice in order to change the ice to water quickly. Next, while turned on the heater, the value of voltage and current were recorded. After recording the values, the mass of water was measured that caught from each funnel in five minutes. Finally, after getting the values of masses, voltage and current, the calculation was done.Figure 1, more ice melts in the side with the beaterPart.2 the specific latent heat of vaporization of waterFinding lv can be done using the equipment below in figure 2. First of all, put a measuring cylinder on a top pan balance and surround the cylinder with lagging. The inside aluminium metal container was measured by electronic balance and the lid keep open. After the measuring cylinder was filled with water, the power was turned on to supply. Then wait the moments until the water came back to the boil. After the water was boiling, the mass of water was recorded and the clock was started. Thirdly, the p ower supply was connected and the power was set to 1100w. Finally, a little of the water in cylinder was emptied to become steam and the mass of water also was recorded. The apparatus in this experiment as in figure 2.Figure 2, the boiling water in measuring cylinderResultsPart 1. The specific latent heat of fusion of ice.Table.1 The measurement of latent heat of fusion of ice.The ice with heaterFunnel without heaterMass of cup (g)7373Mass of cup with water (g)9383Mass of water (g)2010Table.1 shows the measurement of latent heat of fusion of ice. The masses are measured by electronic balance; the current of the circuit is 1.5A and the voltage of the circuit is 6V.The error of mass:  ± 1gThe error of heat:  ± 10JPart.2 the specific latent heat of vaporization of water.M1 ( the boiling water)M2 ( after 3 minutes)100049Table.2 The data of the specific latent heat of vaporization of water.Table.2 shows the data of the specific latent heat of vaporization of water which is the difference of the masses of water. In the experiment, the mass of the balance is 79g; the temperature of the water is 100â„Æ';the power of cylinder is 1100W; the time is 3 minutes. And the error of the mass is  ± 1g.DiscussionThe specific latent heat of fusion of ice and the specifi c latent heat of vaporization of water are calculated by the measurement in the tables of result section. The calculation of the specific latent heat of fusion of ice is as follows. Heat lost by water is equal to the mass times the specific latent heat of fusion and the equation is VtI=ML, M is mass of water in difference, t stands for the time taken for heat the ice and L is the latent heat of fusion of ice. ThereforeL ==∠µ=2700J ∠´L=2.7Ãâ€"105Jkg-1 and it is not very similar to the exact value of the latent heat of fusion of ice, which is 3.3Ãâ€"105 Jkg-1. Next part is the specific latent heat of vaporization of water. The heat gained to the water and the cylinder is equal to the work down by the circuit which is 1100W, E=W Ãâ€" t=M lv, which E is the energy gained to the water and the cylinder, M is mass of balance, lv represents the specific latent heat of vaporization of water. From the equation just above, therefore Lv= => and then Lv =2.5Ãâ€"106 Jkg-1. It is also not very similar to the exact value of the specific latent heat of vaporization of water, which is 2.3Ãâ€"106 Jkg-1.According to Duncan (2000:68) â€Å"the kinetic theory sees the supply of latent heat to a melting solid as enabling the molecules to overcome sufficiently the force between them for the regular crystalline structure of the solid to be broken down. And when vaporization of a liquid occurs a large amount of energy is needed to separate the molecules and allow them to move around independently as gas molecules†.

The Bloomsbury Group Essay -- History People Authors Essays

The Bloomsbury Group The Bloomsbury Group consisted mainly of family, colleagues, and friends who shared ideas in writing and painting. "Bloomsbury" signified a group of people who were close in friendship as well as in talent. The Bloomsberries, who were known as the Bloomsbury Group, spent a tremendous amount of time together. Each individual attempted to contribute valuable ideas to one another’s individual works. Two of the most important aspects of the Bloomsberries were Literature and Art. All members of this circle of intellectuals were vastly incorporated with both of these aspects as well as a few others. The most well recognized writer of this group was Virginia Woolf. "The Bloomsbury Group is a popular collective designation for, a number of English intellectuals prominent in the first quarter of the 20th century, all of whom were individually known for their contributions to the arts or to the social science" (www.funkandwagnall.com/encyclopedia/low/articles/b/6003001758.html). Bloomsbury is a residential and academic district in London. "Bloomsbury" began shortly after the death of Sir Leslie Stephen in 1904" ( Johnstone 3). Leslie Stephen with the help from the Victorians basically prepared a passage for "Bloomsbury" to come about. The death of Sir Leslie Stephen was basically how the Bloomsberries finally came out into the open. "Leslie Stephen’s life, which neatly straddled Victoria’s reign, was an epitome of a facet of the intellectual life of that era" (Johnstone 3). The Bloomsberries and the Victorians were quite diverse in their style of art. The Bloomsberries rebelled against the Victorians. "It is a polemic against the Vic torian establishment and its culture- that culture which Bloomsbury believed ha... ...hroughout all of that she achieved great accomplishments as her life went on. The Bloomsbury Group will always be remembered to many people that have a love for literature. Works Cited http://kvtr.elte.hu/csoport/ago/eng.html http://metalab.unc.edu/cheryb/women/virginia-woolf.html http://www.bloomsburyart.com/list.htm http://www.cwrl.utexas.edu/%7evfores/sorian03.html http://www.funkandwagnall.com/encyclopedia/low/articles/b/6003001 758.html http://www.helicon.co.uk http://www.jefferson.village.virginia.edu/elab/hf10225.html http://www.online-library.org/fictions/kew-gardens.html Johnstone, John Keith. The Bloomsbury Group; a study of E.M. Forster, Lytton Strachey, Virginia Woolf, and their circle. New York: Noon Day Press, 1954. Marcus, Jane. Virginia Woolf and Bloomsbury. Bloomington: Indiana University Press, c1987. The Bloomsbury Group Essay -- History People Authors Essays The Bloomsbury Group The Bloomsbury Group consisted mainly of family, colleagues, and friends who shared ideas in writing and painting. "Bloomsbury" signified a group of people who were close in friendship as well as in talent. The Bloomsberries, who were known as the Bloomsbury Group, spent a tremendous amount of time together. Each individual attempted to contribute valuable ideas to one another’s individual works. Two of the most important aspects of the Bloomsberries were Literature and Art. All members of this circle of intellectuals were vastly incorporated with both of these aspects as well as a few others. The most well recognized writer of this group was Virginia Woolf. "The Bloomsbury Group is a popular collective designation for, a number of English intellectuals prominent in the first quarter of the 20th century, all of whom were individually known for their contributions to the arts or to the social science" (www.funkandwagnall.com/encyclopedia/low/articles/b/6003001758.html). Bloomsbury is a residential and academic district in London. "Bloomsbury" began shortly after the death of Sir Leslie Stephen in 1904" ( Johnstone 3). Leslie Stephen with the help from the Victorians basically prepared a passage for "Bloomsbury" to come about. The death of Sir Leslie Stephen was basically how the Bloomsberries finally came out into the open. "Leslie Stephen’s life, which neatly straddled Victoria’s reign, was an epitome of a facet of the intellectual life of that era" (Johnstone 3). The Bloomsberries and the Victorians were quite diverse in their style of art. The Bloomsberries rebelled against the Victorians. "It is a polemic against the Vic torian establishment and its culture- that culture which Bloomsbury believed ha... ...hroughout all of that she achieved great accomplishments as her life went on. The Bloomsbury Group will always be remembered to many people that have a love for literature. Works Cited http://kvtr.elte.hu/csoport/ago/eng.html http://metalab.unc.edu/cheryb/women/virginia-woolf.html http://www.bloomsburyart.com/list.htm http://www.cwrl.utexas.edu/%7evfores/sorian03.html http://www.funkandwagnall.com/encyclopedia/low/articles/b/6003001 758.html http://www.helicon.co.uk http://www.jefferson.village.virginia.edu/elab/hf10225.html http://www.online-library.org/fictions/kew-gardens.html Johnstone, John Keith. The Bloomsbury Group; a study of E.M. Forster, Lytton Strachey, Virginia Woolf, and their circle. New York: Noon Day Press, 1954. Marcus, Jane. Virginia Woolf and Bloomsbury. Bloomington: Indiana University Press, c1987.

Mamie Clark

Running head: MAMIE CLARK 1 Famous Person in Psychology: Mamie Phipps Clark MAMIE CLARK 2 Famous Person in Psychology: Mamie Phipps Clark Mamie Phipps Clark was born in Hot Spring, Arkansas on April 18, 1917 to Dr. Harold and Katie Phipps.Due to her father having a practice in town the family had achieved middle class status and was allowed into many establishments that were normally whites only, which during that time in Arkansas was rarely heard of. Even though few higher educational opportunities were open to black students, after graduating from Langston High School in 1934, Mamie was offered several scholarships and chose to accept one from Howard University. (Cherry,2013) Mamie chose to study at Howard University because it was located in the nation's capital and because of the many accomplished black members of its faculty whom she viewed as role models.She began her studies at Howard as a math major, minoring in physics. There she met her future husband, Kenneth B. Clark, w ho was studying for his master’s in psychology. After not getting much encouragement from her professor’s in mathematics, Kenneth encouraged Mamie to change her major to psychology for employment possibilities and the chance to explore her interest in children. (Cherry, 2013) When completing her master’s degree in 1939, she worked and studied children in an all-black preschool.During that time she met with pyschologists, Ruth and Gene Harley who were studying self-identification in young children and encouraged Mamie to do the same with the children in the preschool. This resulted in her completed thesis â€Å"The Development of Consciousness of Self in Negro Pre-School Children†. (Cherry,2013) MAMIE CLARK 3 Mamie transferred to Columbia University to finish her doctorate degree, where she graduated in 1943 as the second African American to earn a degree (first eing her husband, Kenneth Clark). Then Drs. Mamie and Kenneth Clark used their research with c hildren to show that black children became aware of their racial identity by the age of 3 and by segregating them from white children the children saw their race as negative. This led the Clark’s to present their findings during desegregation trials for the NAACP's case in Brown v. Board of Education, which overturned racial segregation in public schools in 1954. (Mamie Clark, 2013)After several years working in public and private social services being unsatisfied with what she saw, Mamie founded the Northside Center for Child Development, the first center to provide therapy for children in Harlem. At a time when public schools were illegally enrolling many black children into programs for the mentally handicapped, the center conducted its own intelligence tests, fought the schools, and empowered the local population. Realizing that therapy alone could not address the affects of racism on the community, Northside also assisted families with their housing and financial difficu lties.Mamie Clark worked for Northside until retirement in 1980 and died three years later of cancer. (Mamie Clark, 2013) Using the Sociocultural aspect of psychology, it is easily seen that Mamie Clark was influenced by social and cultural she experienced in her life. Growing up in Arkansas during the times where racism were very apparent and segregation was dominant, she was fortunate enough to have been born into a middle class family. Mamie was able to see both sides of the segregation by being allowed into white establishments.This had a significant impact on her way of thinking, she wanted to both races to be seen equally and this eventually led to her involvement in the desegregation of public schools. MAMIE CLARK 4 References Mamie Clark, a Supporter of the Black Child. (2013). Retrieved on January 18, 2013 from http://www. aaregistry. org/historic_events/view/mamie-clark-supporter-black-child Cherry, Kendra. Mamie Phipps Clark Biography. (2013). Retrieved on January 18, 20 13 from

The Picture Of Dorian Gray Oscar Wilde - 2014 Words

Adrian Balakumar Mr.Sal AP Lit 15 December 2014 The Picture of Dorian Gray - Oscar Wilde 1) In the book, The Picture of Dorian Gray, several characteristics of the world have been presented. The author portrays the world as a den of individuals with a skewed view of the immediate environment. The author depicts the world as a place where physical traits like beauty or handsomeness are important than a person’s virtues. Dorian spends his time studying music and other beautiful things that life has to offer. Visible aspects such as youthfulness are viewed by the characters of the novel as the most superior aspects of life. Lord Henry reminds Dorian that soon he would lose vital attributes that mattered to him in life. By saying so, he†¦show more content†¦The author describes him as an intellectual and unshakeable. He can influence Dorian, who later worships and follows him blindly. Lord Henry holds skeptical beliefs that are due to destabilizing the status quo, but in the real sense his theories are filled with naivety. His character depicts a man full of composure and filled with witty ideas. He negates widely accepted views of the existence of immoral books stating that those texts expose the real face of the world. He clings to this as his philosophy. Although he does believe in theories relating to immorality, the yellow book that he lent Dorian lead to Dorian’s downfall. The actions of Lord Henry brings out the theme of negative influence and its consequences. Through Lord Henry, Dorian commits suicide. The author tries to depict how the world is affected by such negative influences. The author also uses Lord Henry to illustrate the superficial nature of human beings. Lord Henry claims that moral and immoral experiences should have equal pursuit. To the contrary, he is a party man and frequents the theater. The author also shows how humans are having little understanding of the soul. Lord Henry had earlier claimed that Dorian could not commit suicide yet at the end of the story he does. From Lord Henry unwillingness to change, we are supposed to learn the essence of appreciating new ideas. In addition to that, it is evident that a change is inevitable. 3) The book title gives us insight into