Stacey+&+Jen's+Calorimetry+Lab

= Calorimetry Lab Report = Date of Publication (Date of Most Recent Edits)


 * Participants**: Stacey Schellong and Jen Grobe
 * Purpose**:
 * Lab Documents**: Include a link to any documentation provided for the lab or any references used in writing the lab report.


 * Brief Description of Experiment**:
 * Data**:
 * <  ||< **Mass of Metal** ||< **Temp of Metal** ||< **Mass of Water** ||< **Temp of Water** ||< **Final Temp** ||< **Water Temp Change** ||< **Metal Temp Change** ||
 * = **1** ||= **113.08** ||= **100** ||= **188.74** ||= **23.8** ||= **27.6** ||= **3.8** ||= **72.4** ||
 * = **2** ||= **112.64** ||= **100** ||= **197.3** ||= **23.6** ||= **26.4** ||= **2.8** ||= **73.6** ||
 * = **3** ||= **113.08** ||= **100** ||= **194.4** ||= **24** ||= **27.6** ||= **3.6** ||= **72.4** ||
 * = **4** ||= **112.39** ||= **100** ||= **147.44** ||= **23.6** ||= **26.2** ||= **2.6** ||= **73.8** ||


 * =  ||= **Mass of Wax** ||= **Temp of Wax** ||= **Mass of Water** ||= **Temp of Water** ||= **Final Temp** ||= **Water Temp Change** ||= **Wax Temp Change** ||
 * = **1** ||= **9.79** ||= **100** ||= **178.87** ||= **22.8** ||= **24.4** ||= **1.6** ||= **75.76** ||
 * = **2** ||= **8.87** ||= **100** ||= **166.4** ||= **23.6** ||= **24.3** ||= **.7** ||= **75.7** ||
 * = **3** ||= **9.31** ||= **100** ||= **225.04** ||= **24.1** ||= **24.6** ||= **.5** ||= **75.4** ||
 * = **4** ||= **8.99** ||= **100** ||= **148.95** ||= **23.7** ||= **26.0** ||= **2.3** ||= **74.0** ||


 * Sample Calculations:

Metal:** (Q)** || mass x specfic heat (4.186) x water's change in temp Example: 188.7 x 4.186x 3.8 = 3002.25 || (Q)** || mass x specific heat (.9) x water's change in temp Example: 61.73 x .9 x 3.8 = 211.12 || (C)** || (heat of water + heat of calorimeter) / (mass of metal x metal change in temp) Example: (3002.25 + 211.12) / (113.08 x 72.4) = .39 ||
 * **Heat of Water
 * **Heat of Calorimeter
 * **Specific Heat of Metal

Results: Describe the major result of the experiment and how you arrived at this result. Typically, this will refer back to the purpose. For example, if the purpose was to find the coefficient of friction, you would write: The coefficient of static friction was determined to be 0.45. This was calculated from a measured angle using Newton's first law as desribed in the calculations.
 * Lab Questions**:
 * 1) In what ways did you attempt to make your result as accurate as possible? We calculated the amount of heat lost into the metal of the calorimeter. We found a difference of .03 in our calculations. For the wax we had to attribute to the three different ways heat was being released within the cooling process.
 * 2) In what ways does the calorimeter fail as a closed system? What mathematical effect on your results would these failures have? With the wax, the test tube did not fit all the way in the calorimeter so we were not able to completely close the lid. Therefore- heat was able to escape from the closed system. Also heat was being absorbed into the metal of the calorimeter so we needed to account for that. We found that there was a difference in the specific heat by .03.
 * 3) Suppose you were asked to measure the latent heat of vaporization of water. You propose to do this by heating a bar of the metal used in this experiment to a very high temperature (500°C) and dropping it into a calorimeter with water initially at 95°C. Describe what you think will happen and what measurements you would need to make in order to calculate the latent hear. When the metal dropped into the water- vapor would immediately steam out. The temperature of the metal would drop significantly and the temperature of the water would rise between 3 and 5 degrees.


 * Conclusion**: A good conclusion will include:
 * A statement about whether you think that the experiment produced a valid and reproducible result and reasoning supporting your statement.
 * A suggestion as to why your experimental results differ from any accepted value or your expected result (if appropriate).
 * A suggestion for a simple improvement to the experiment. Think about what caused problems, measurement inaccuracies, or inappropriate simplifying assumptions and propose a change. A sketch may be helpful.

//Don't forget to link to your lab report from the lab reports page and to include a link to your lab report in your reflection.//