constant pressure and volume

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annikaying
Posts: 94
Joined: Sat Sep 14, 2019 12:16 am

constant pressure and volume

Postby annikaying » Wed Feb 12, 2020 3:08 pm

How do constant pressures and volumes affect the calculations for entropy, enthalpy, and Gibbs free energy?

Kishan Shah 2G
Posts: 132
Joined: Thu Jul 11, 2019 12:15 am

Re: constant pressure and volume

Postby Kishan Shah 2G » Thu Feb 13, 2020 1:28 am

Constant volume means there is no work done. At constant pressures, q is equal to delta H and work is -PdeltaV.

cassidysong 1K
Posts: 100
Joined: Fri Aug 30, 2019 12:15 am

Re: constant pressure and volume

Postby cassidysong 1K » Thu Feb 13, 2020 11:45 am

^^ At constant pressure delta H equals q and at constant pressure work equals zero.

Kayli Choy 2F
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: constant pressure and volume

Postby Kayli Choy 2F » Sat Feb 15, 2020 9:07 pm

Additionally, if the problem says a reaction is isobaric, that implies that pressure is constant. If a reaction is isochoric, isovolumetric, or isometric, that implies that volume is constant.


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