Calorimetry and Hess Law

Calorimetry and Hess Law - Chemistry 107 November 3, 2007...

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Chemistry 107 November 3, 2007 Summary: Part A: The computer was turned on and the Logger Pro was opened. The experiment selected was experiment 8. After this was accomplished the materials were gathered. These included: two Styrofoam cups to act as the calorimeter, a 250 mL beaker, a temperature probe, a thermometer, a hot plate, and a 125 mL Erlenmeyer flask. First, the Styrofoam cups were placed on top of each other and then weighed to the nearest 0.01 g. After this was attained 40 mL of distilled water was added to the cups and they were reweighed. Next, the Styrofoam cups were placed inside the 250 mL beaker and a clamp and a slit stopper were used o suspend a temperature probe located inside the calorimeter. After this was accomplished, 50 mL of distilled water was added to the 125 mL Erlenmeyer flask. It was heated to 80 degrees Celsius. This was monitored using the thermometer. Next, the computer was told to collect data for 3 minutes. This created a flat line across the graph, because the temperature probe was collecting the room temperature. At the end of 3 minutes, the 80 degree Celsius hot water was added to the calorimeter. One was instructed to stir gently. Part B:
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This note was uploaded on 04/27/2009 for the course CHEM 107 taught by Professor Generalchemforeng during the Spring '07 term at Texas A&M.

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Calorimetry and Hess Law - Chemistry 107 November 3, 2007...

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