## Reversible vs Irriversible

AngieGarcia_4F
Posts: 120
Joined: Thu Jul 25, 2019 12:17 am

### Reversible vs Irriversible

Can anyone explain what makes an expansion reversible versus irreversible?

Asha Agarwal 1E
Posts: 51
Joined: Fri Aug 30, 2019 12:16 am

### Re: Reversible vs Irriversible

An Irreversible reaction occurs when the external pressure of the surroundings and temperature remain constant and the volume of the system is changed, therefore changing the internal pressure of the system. In the case of irreversible reactions, there is no equilibrium possibility and the equation used is -Petx∆V. On the other hand, a reversible expansion occurs when temperature remains constant and the system and surroundings are allowed to reach equilibrium. You use the equation -nRTln(v2/v1) for work.

Maika Ngoie 1B
Posts: 97
Joined: Fri Aug 02, 2019 12:16 am

### Re: Reversible vs Irriversible

A good tell for for reversible and irreversible is that irreversible reactions occur under constant pressure

005324438
Posts: 51
Joined: Sat Aug 24, 2019 12:16 am

### Re: Reversible vs Irriversible

If it happens slowly, tiny steps at a time, it is reversible. If it happens very quickly, and some of the energy is lost, it is irreversible.