## reversible/irreversible

Phillip Tran
Posts: 54
Joined: Thu Jul 13, 2017 3:00 am

### reversible/irreversible

can anyone explain the difference between reversible and irreversible expansion? are there specific formulas for each conditions?

Salma Quintanilla 1J
Posts: 29
Joined: Wed Nov 23, 2016 3:02 am

### Re: reversible/irreversible

The difference is that during a reversible process, the system will always be at equilibrium with its surroundings. For an irreversible process, there will always be an entropy change.

Lisa Tang 1C
Posts: 62
Joined: Fri Sep 29, 2017 7:05 am
Been upvoted: 2 times

### Re: reversible/irreversible

There are a couple formulas for work that differ based on if a reaction is undergoing reversible or irreversible expansion. If the reaction is reversible, then use w=-nRTln(Vfinal/Vinitial), where T is the absolute temperature. When a reaction is irreversible and the external pressure is constant, then use w=-Pex$\Delta$V.

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