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Lab 5-Heat of Reaction - Roshni Sheth CH 116-M3 Partners...

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Roshni Sheth CH 116-M3 Partners: Kaity Brown, Chris Suda October 7, 2009 Heat of Reaction 1. Introduction In this experiment, the purpose is to determine the heat of reaction, or q value, by using a calorimeter. A calorimeter provides constant pressure, so the heat of reaction per mole of water produced will equal the enthalpy for the experiment. First, to find the q value, mix the acid and base solutions, where the base is limiting. Then, mix the acid and base solutions again, where the acid is limiting, and use the previously found enthalpy to determine the q value. This will lead to finding the concentration of the acid. 2. The Experimental Section To begin the first of two parts of the experiment, measure 10mL of NaOH solution, and put it into a coffee cup calorimeter. Place the lid on the calorimeter, stir the solution for 30 seconds, and take and record a temperature reading. Then, add 25mL of acetic acid solution to the coffee cup, and stir the solution for one minute. Take another temperature reading and record it. Discard the solution from the coffee cup. Repeat this procedure two
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