chem lab3

chem lab3 - 10 Matt Idleman Nick Rotruck 3/8/08 QUESTION:...

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Nick Rotruck 3/8/08 QUESTION: How do you use Hess’s Law to find the enthalpy change of a certain reaction? HYPOTHESIS: I believe that if my partner and I follow the procedure correctly, we will achieve an enthalpy change for the final reaction that is within 20% of the accepted value. PROCEDURE: 1. Found the heat capacity of the calorimeter by using adding hot water to room temperature water in the calorimeter and recording the change in temperature that occurred over the next three minutes. 2. Found the heat of reactions for three different reactions, including: HCl + NaOH, NH 3 + HCl, and NH 4 Cl + NaOH. This was done by: a. Finding the initial temperature of the 2 solutions. b. Adding them both to the calorimeter. c. Covering the calorimeter and mixing the solution with a magnetic stirrer. d. Recording the temperature change of the solution every 20 seconds for three minutes. e.
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This note was uploaded on 11/17/2009 for the course NA na taught by Professor Na during the Spring '09 term at WVU.

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chem lab3 - 10 Matt Idleman Nick Rotruck 3/8/08 QUESTION:...

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