calculating work


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Aschreck 2G
Posts: 9
Joined: Fri Sep 25, 2015 3:00 am

calculating work

Postby Aschreck 2G » Fri Jan 29, 2016 7:03 pm

How does one calculate work of an irreversible system? I'm a bit confused on the difference between reversible/irreversible

jennifer_zhou2C
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

Re: calculating work

Postby jennifer_zhou2C » Fri Jan 29, 2016 7:07 pm

Reversible uses more work. The equation for that is w=-nRTln(V2/V1). For irreversible, use the equation w=P delta V. The pressure of work is the pressure of surroundings.

Chem_Mod
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Re: calculating work

Postby Chem_Mod » Sat Jan 30, 2016 11:49 am

The above discussion is correct! Just some clarification: reversible work w=-nRTln (V2/V1) is applied in ISOTHERMAL process. For irreversible process, it is w=-P deltaV


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