Expansion vs. Nonexpansion work


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Ann Pham
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Joined: Fri Sep 25, 2015 3:00 am

Expansion vs. Nonexpansion work

Postby Ann Pham » Sun Jan 17, 2016 12:45 am

What's the difference between expansion and nonexpansion work? What kind of equation can be used to calculate expansion work or nonexpansion work?

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Re: Expansion vs. Nonexpansion work

Postby Chem_Mod » Sun Jan 17, 2016 3:07 am

Expansion work is pressure-volume work, and nonexpansion work is anything else (electrical, friction, motional, etc.)

Expansion work is always given by w=-Pext*dV while there is no fixed formula for the nonexpansion work. However, the Gibbs free energy gives the maximum amount of nonexpansion work that could be done.

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