constant-volume vs. constant-pressure calorimeters

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Yiling Liu 1N
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Joined: Sat Jul 09, 2016 3:00 am

constant-volume vs. constant-pressure calorimeters

Postby Yiling Liu 1N » Sun Jan 15, 2017 3:36 pm

I was reading about constant-volume and constant-pressure calorimeters in the textbook. I was wondering how one knows to distinguish which calorimeter to use in a combustion experiment.

For instance, if I wanted to see experimentally find the reaction enthalpy of the combustion of benzene, could I use a constant-volume calorimeter to conduct this experiment? (On page 288 the textbook describes this experiment with use of a constant-pressure calorimeter.)

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Re: constant-volume vs. constant-pressure calorimeters

Postby Chem_Mod » Sun Jan 15, 2017 6:48 pm

You definitely could. For physical chemistry labs, a common experiment is to use a bomb calorimeter to find enthalpy data for the combustion of various hydrocarbons.

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