Calometry Lab

Volume of water in the calorimeter:| 26. 0 mL| 26. 0 mL| 26. 0 mL| 26. 0 mL| Initial temperature of water in calorimeter:| 25. 3 Â °C| 25. 3 Â °C| 25. 3 Â °C| 25. 3 Â °C| Temperature of hot water and metal in hot water bath:| 100. 5 Â °C| 100. 5 Â °C| 100. 5 Â °C| 100. 5 Â °C| Final temperature reached in the calorimeter:| 31. 6 Â °C| 34. 8 Â °C| 33. 1 Â °C| Â  34. 5 Â °C| Part I: Part II: Metal:| Metal A| Metal B| Metal C| Mass of metal:| 15. 262 g| 25. 605 g| 20. 484 g| Volume of water in the calorimeter:| 24. mL| 24. 0 mL| 24. 0 mL| Initial temperature of water in calorimeter:| 25. 2 Â °C| 25. 3 Â °C| 25. 2 Â °C| Temperature of hot water and metal in hot water bath:| 100. 3 Â °C| 100. 3 Â °C| 100. 3 Â °C| Final temperature reached in the calorimeter:| 27. 5 Â °C| 32. 2 Â °C| 28. 0 Â °C| Part 12: Part I: 1. Calculate the energy change (q) of the surroundings (water) using the enthalpy equation qwater = m ? c ? ?T. We can assume that the specific heat capacity of water is 4. 18 J / (g ? Â °C) and the density of water is 1. 00 g/mL. qwater = m ? c ? ?T m = mass of water = density x volume = 1 x 26 = 26 grams T = T(mix) T(water) = 38. 9 25. 3 = 13. 6 q(water) = 26 x 13. 6 x 4. 18 q(water) = 1478 Joules SPECIFIC HEAT: qmetal = -205 J = 15. 363 g X c X (27. 2 100. 3 C) c = 0. 183 J/gC PART2. Using the formula qmetal = m ? c ? ?T, calculate the specific heat of the metal. Use the data from your experiment for the metal in your calculation. q(water) = q(metal) q(metal) = 1478 Joules q(metal) = m ? c ? ?T m = 27. 776 g ?T = T(mix) T(metal) ?T = 38. 9 100. 5 = 61. 6 C = q(metal) / m x ? T C = -1478 / (-61. 6 x 27. 776 ) C = 0. 864 J / (g ? Â °C) Part 3: 12: For #1 theres a specific heat of 0. 864 J / (g ? Â °C) and that is closest to the specific heat of aluminum. So, for this experiment, lets call your metal aluminum. Now, the percent error formula is this: |experimental actual value divided by actual value| x 100 (|0. 864 0. 900| / 0. 900) * 100 = 4. 00 % For #2, you got 0. 183 J/gC. Comparing it to my list, I would recommend some sort of tin or cobalt meltal. 3. 9(. 39-. 39)x100%)/. 39 = 0% So there is a 0% error. It makes sense, given that the experimental results were THE SAME as the known value. Its the same. There is no error. 4. The easiest error reason is that the calorimeter wasnt a perfect insulator. This is because you must have opened the calorimeter when you added the cold water. Thus, heat was lost not only to the cold water but to the surrounding environment. Also, you might not have waited long enough for the thermometer to read, so the temperature of the hot water was lower than it really was, or the temperature of the cold water was warmer than it really was. Another possible source of error is the increase in heat by stirring due to increased kinetic energy.

Animal rights Essay Example | Topics and Well Written Essays - 1750 words - 1

Animal rights - Essay Example In that regard therefore, awareness on the rights of both human beings and animals need to be brought to the attention of the world. After shedding light as to what right entails, the general public then automatically holds the responsibility of asking why. Here, it is realized that the rights of humans are well found on the basis of the animals rights. It is clear that animal rights establish what is termed as a philosophical stand for the human rights, just as is put clear in Reagan’s theory where he considers life as the body of integrity and argues that it is to be protected. The theory further argues on the study by Tuskegee that the liberty of individual beings has to be protected. The moral theory extends this same protection to all sorts of life forms out in there globe. It beats one’s sense of reason when one tries to consider animals in the category of subject of life. Animals are subject-of-life. In reality, common sense should apply in such instances. Firstly, the behavior of both human beings and animals are the same; human beings and animals have a psychological supportive linkage that explains the similarity between the two. Firstly, the behavior of both humans and animals are the same; human beings and animals have a psychological supportive linkage that explains their similarity. It should be noted that if the rights of human beings are founded in the rights of who they are, then the rights of animals are also rooted in the sense of belonging that the human beings share. It is realized that individuals with experimental mind sets have their warfare aspects directly affects matters of their personal character. This sort of interest tends to override the common sense that supports the real aspect of rights. The science of judgment and ethical evaluations are blinded by the struggle to make an outcome from their internal element of success. In the experiment, world’s scientists have a role to

Lenin's Cultural Policy and the Persecution of the Arts Essay

Lenin's Cultural Policy and the Persecution of the Arts - Essay Example However, things were not the same as shown to the world. The growing experimentation in the arts and cultural aspects of Russia forced Lenin to embrace more conservative and traditional ways and it was because of this reason that since his early days, Lenin started to control cultural institutions of the country. This control of culture in the country further worsened as the Lenin’s Communist party started to target those musicians and artisans who were relatively against the Communist thought. Lunacharsky- Lenin’s main person behind controlling the Cultural Revolution in the country put forward his own aesthetic theories which largely redefined the socialist art, however; this was often criticized by the later scholars for the reasons of curtailing the artistic creativity. â€Å"In the late 1920s, the term was taken up and transformed by young communist cultural militants who sought the party leaders' approval for an assault on "bourgeois hegemony" in culture; that is, on the cultural establishment, including Anatoly Lunacharsky and other leaders of the People's Commissariat of Enlightenment, and the values of the old Russian intelligentsia. For the militants, the essence of Cultural Revolution was "class war" - an assault against the "bourgeois" intelligentsia in the name of the proletariat - and they meant the "revolution" part of the term literally. In the years 1928 through 1931, the militants succeeded in gaining the party leaders' support, but lost it again in 1932 when the Central Committee dissolved the main militant organization, the Russian Association of Proletarian Writers (RAPP), and promoted reconciliation with the intelligentsia.† (Encylopedia).