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constant pressure and volume

Posted: Wed Feb 12, 2020 3:08 pm
by annikaying
How do constant pressures and volumes affect the calculations for entropy, enthalpy, and Gibbs free energy?

Re: constant pressure and volume

Posted: Thu Feb 13, 2020 1:28 am
by Kishan Shah 2G
Constant volume means there is no work done. At constant pressures, q is equal to delta H and work is -PdeltaV.

Re: constant pressure and volume

Posted: Thu Feb 13, 2020 11:45 am
by cassidysong 1K
^^ At constant pressure delta H equals q and at constant pressure work equals zero.

Re: constant pressure and volume

Posted: Sat Feb 15, 2020 9:07 pm
by Kayli Choy 2F
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.