## Reversible, Irreversible

Christy Lee 2H
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Joined: Fri Sep 29, 2017 7:07 am
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### Reversible, Irreversible

Can someone explain the difference between reversible and irreversible reactions?

Jasmine Wu 1L
Posts: 55
Joined: Thu Jul 27, 2017 3:00 am
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### Re: Reversible, Irreversible

In a reversible process, the system and surroundings can be "reversed" to its initial state by an infinitely small change, thus not changing the thermodynamic properties of the universe.

In an irreversible process, which is most natural, the infinitely small change does not reverse to the initial state from the final state of the system and surroundings.

Mitch Walters
Posts: 45
Joined: Fri Sep 29, 2017 7:07 am

### Re: Reversible, Irreversible

Reversible means that the two pressures are essentially equal and that an infinitesimal change can cause expansion. Irreversible is when no such change can occur.

Christy Zhao 1H
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am

### Re: Reversible, Irreversible

Also, keep in mind that a reversible process does more work than an irreversible process.

William Xu Dis 1D
Posts: 31
Joined: Fri Sep 29, 2017 7:05 am

### Re: Reversible, Irreversible

To elaborate on the point that reversible work does more work than irreversible work, the reason why that is is that because in a reversible processes, the system is performing work against a pressure always less than just an infinitesimal amount, the max work is being done. In an irreversible process, the system is doing work against a constant pressure, so the opposing pressure of the system doesn't contribute to perform max work.