## Reversible Expansion

$w=-P\Delta V$
and
$w=-\int_{V_{1}}^{V_{2}}PdV=-nRTln\frac{V_{2}}{V_{1}}$

Arjun Sharma 1D
Posts: 33
Joined: Fri Sep 29, 2017 7:06 am

### Reversible Expansion

I think I understand the concept of a reversible expansion as it applies to problems we'll be doing in this class. But I don't understand the point of reversible expansion, like how does it apply to real life?

Suchita 2I
Posts: 59
Joined: Fri Sep 29, 2017 7:04 am

### Re: Reversible Expansion

Although reversible expansion allows you to calculate the maximum work that can be done, this is not practically possible as it would take an infinite amount of time. However, I guess one possible application is that it can be used to assess the efficiency of irreversible expansion.

Ramya Lakkaraju 1B
Posts: 67
Joined: Fri Sep 29, 2017 7:03 am

### Re: Reversible Expansion

In the equation S=qrev/T, why do we need to use the q for a reversible reaction?

Arjun Sharma 1D
Posts: 33
Joined: Fri Sep 29, 2017 7:06 am

### Re: Reversible Expansion

@Ramaya Lakkaraju 1B, I think it has to do with the fact that equation comes from situations where q=-w, which may only be true for reversible processes. Need confirmation on that though.