Chem lab 7 - Joseph Brennan Zachary Peirce Alec Lebris Chem...

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Joseph Brennan Zachary Peirce Alec Lebris Chem 102- Section 0026 Measuring Heat Transfer with a Calorimeter 11/2/2007
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Purpose: The purpose of this experiment was to determine how much heat was transferred from metal to water, salt to water, and metal to acid. To do this we used a calorimeter to measure the temperature and the change in temperature. To determine this we had to use the equation Change ∆T=Tf-Ti. Procedure: The first part of the experiment was determining the specific heat of a solid. To start we placed a half full 250 mL beaker of water on a hot plate to boil. Then we weighed a metal cylinder and lowered it into the boiling water. Then we weighed out our thermos calorimeter and filled it half way with cold water and weighed it again. We then watched the temperature of the water in the calorimeter until it held constant and the boiling water until it becomes constant. Then transfer the metal cylinder from the boiling water to the cool water in the colorimeter and record when the temperature peaks. We repeated this part one more time before moving on. The next part of this experiment was determining the heat of solution. To do this we assembled out Styrofoam calorimeter and weighed it. Then filled it with 15mL of water and weighed it again. After this we put a thermometer through the top and monitored the temperature until it remained constant. Then we weighed out 1.0g of one of the salts and slowly added it to the water of the calorimeter. Then we monitored the temperature until it reached a maximum of minimum and recorded the final temperature. Then we repeated this with the other four salts. The final part of this experiment was to determine the heat of reaction. To start out we weighed out a Styrofoam calorimeter and added 15.0mL of hydrochloric acid to it and weighed it again. Then put a thermometer through the top and monitored the temperature until it held constant. Then we weighed out
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Chem lab 7 - Joseph Brennan Zachary Peirce Alec Lebris Chem...

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