## Reversible and Irreversible Expansion

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### Reversible and Irreversible Expansion

What are reversible and irreversible expansion? What do they mean?

Brian_Ho_2B
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Joined: Fri Aug 09, 2019 12:16 am

### Re: Reversible and Irreversible Expansion

Reversible expansions allow the gas to return to its original volume naturally on its own. Irreversible expansions change to a certain volume and stay there. There are different equations for the work done by expansion for each of those cases. For reversible expansions, w = -nRT*ln(V2/V1) and for irreversible expansions against an external pressure, w = -P(exterior)* change in Volume.

Harry Zhang 1B
Posts: 101
Joined: Sat Sep 14, 2019 12:16 am

### Re: Reversible and Irreversible Expansion

Reversible expansion means when the expansion can be reversed by an infinitesimal change, while irreversible means when an infinitesimal change will not reverse the direction of expansion.

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