## Expansion vs. Nonexpansion work

$w=-P\Delta V$
and
$w=-\int_{V_{1}}^{V_{2}}PdV=-nRTln\frac{V_{2}}{V_{1}}$

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

### Expansion vs. Nonexpansion work

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

Chem_Mod
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### Re: Expansion vs. Nonexpansion work

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.