## Expansion

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

EthanPham_1G
Posts: 104
Joined: Sat Jul 20, 2019 12:17 am

### Expansion

What is the difference between work of expansion and work of compression?

Isabella Dal Porto 1H
Posts: 100
Joined: Fri Aug 30, 2019 12:16 am

### Re: Expansion

Compression will have positive work on the gas whereas expansion will have negative work on the gas.

Cole Woulbroun 1J
Posts: 56
Joined: Thu Jul 25, 2019 12:16 am

### Re: Expansion

Work of expansion occurs when the gas is doing work on an object(s), such as a piston, and work of compression occurs when an object(s) is doing work on the gas. Work of expansion has a negative sign and work of compression has a positive sign.

Helen Struble 2F
Posts: 97
Joined: Sat Aug 24, 2019 12:17 am

### Re: Expansion

Work of expansion indicates work being done by the reaction onto the system. Since the flow of energy is from the reaction to the system, we know the reaction is doing work.

RasikaObla_4I
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

### Re: Expansion

work of expansion will be a negative value because the change in volume is positive, while work of compression will be a positive value because the change in volume is negative.