## Two different equations

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

Posts: 103
Joined: Sat Aug 24, 2019 12:15 am

### Two different equations

Can someone explain the difference between the two work equations and when we would use each one?

Selena Yu 1H
Posts: 108
Joined: Fri Aug 09, 2019 12:16 am

### Re: Two different equations

The first work equation is the one with the integral and you would use that if pressure isn't constant. However, if pressure is constant then you would use w = -P ΔV.

rabiasumar2E
Posts: 108
Joined: Thu Jul 11, 2019 12:15 am

### Re: Two different equations

The difference between the two work equations is that one includes the integral and one does not. You use the work equation without the integral when pressure is constant.