## expansion vs nonexpansion

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

Ryan_K_1K
Posts: 51
Joined: Wed Nov 14, 2018 12:18 am

### expansion vs nonexpansion

What was the difference between expansion work and nonexpansion work? In other words, what could create nonexpansion work? Compression?

KeyaV1C
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### Re: expansion vs nonexpansion

Expansion work is pressure-volume work whereas non-expansion work is anything else such as electrical, frictional, etc. For example, biological instances of non-expansion work include muscle contraction and nerve impulses.

Amir Bayat
Posts: 115
Joined: Sat Sep 07, 2019 12:16 am

### Re: expansion vs nonexpansion

Expansion work is when pressure is applied to the object

Veronica_Lubera_2A
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### Re: expansion vs nonexpansion

When a system expands, you should get a negative answer for work. When a system is compressed, you will get positive work.

Kaylee Clarke 1G
Posts: 103
Joined: Fri Aug 30, 2019 12:15 am

### Re: expansion vs nonexpansion

expansion work is done on its surroundings, and is affected by external pressure. but, non-expansion work occurs in a closed system without outside influence

Ryan_K_1K
Posts: 51
Joined: Wed Nov 14, 2018 12:18 am

### Re: expansion vs nonexpansion

Thank you so much for the replies! It all makes sense now!