## reversible and irreversible reactions

$\Delta S = \frac{q_{rev}}{T}$

Ya Gao
Posts: 52
Joined: Fri Sep 29, 2017 7:04 am
Been upvoted: 1 time

### reversible and irreversible reactions

I'm confused about how can we find out if a reaction is reversible or not. Are we gonna be given information about it?

Angela G 2K
Posts: 30
Joined: Fri Sep 29, 2017 7:06 am

### Re: reversible and irreversible reactions

Not sure if this helps, but in a reversible reaction P(in) and P(ex) is the same, whereas in an irreversible reaction P(ex) differs by P(in) by a measurable amount.

Nhan Nguyen 2F
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am
Been upvoted: 1 time

### Re: reversible and irreversible reactions

I believe for the purpose of the class, they might tell you whether it's reversible or not and you'd plug in the associated equation. But maybe this link can help you in identifying some of the common example processes of each
http://www.idc-online.com/technical_ref ... rocess.pdf

Naomi Jennings 2H
Posts: 21
Joined: Thu Jul 13, 2017 3:00 am

### Re: reversible and irreversible reactions

I think it will indicate in the question. If it doesn't specify reversible or irreversible, it's probably irreversible. If "Work is done at a constant pressure" it must be reversible since the internal and external pressures won't be incredibly close together for most of the expansion.

Varsha Sivaganesh 1A
Posts: 51
Joined: Thu Jul 13, 2017 3:00 am

### Re: reversible and irreversible reactions

Usually, if it is reversible and isothermal then the problem will probably indicate that the temperature is constant. In an irreversible expansion, the external pressure is constant.