calorimeter - Michael Glamore Hot and Coldpacks Purpose The...

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Michael Glamore September 15, 2005 Hot and Coldpacks
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Purpose: The purpose of this experiment is to familiarize students with the idea of enthalpy and specific heats. This experiment allows students to take theoretical formulas, along with their own observational data (averaged from a large group of students) to predict the results of a separate experiment. The mathematical formula for the amount of heat needed to raise/lower a specific amount of water by three degrees is used and perfected. Ultimately, predicting an experiment and then using our own knowledge to design our experiment was a very fulfilling process. Formulas: q = ΔH q system = -q surroundings q = mass * specific heat capacity * change in temperature -ΔH solution = C calorimeter * ΔT calorimeter + m mixture *c mixture *ΔT mixture weight of salt = weight of salt in cup – weight of cup IMPORTANT: The specific heat of water is 4.184 J/gC Observations: Week 1 – Constructing the Calorimeter – The calorimeter that we constructed looked like this:
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It was constructed in this fashion in order to keep as much of the heat produced within the system.
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