Work Equations: Which One to Use?


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Frenz Cabison 1B
Posts: 54
Joined: Fri Sep 29, 2017 7:07 am

Work Equations: Which One to Use?

Postby Frenz Cabison 1B » Sun Mar 18, 2018 12:29 am

When do we use w= -Pexdelta v? When do we use w=-nRT ln (V2/V1)?

Michele 2C
Posts: 23
Joined: Fri Sep 29, 2017 7:06 am

Re: Work Equations: Which One to Use?

Postby Michele 2C » Sun Mar 18, 2018 12:33 am

You use w = - pex∆V when external pressure is constant. You use w = - nRT ln(V2/V1) when pressure is variable, or not constant.

Gwyneth Huynh 1J
Posts: 30
Joined: Fri Sep 29, 2017 7:05 am

Re: Work Equations: Which One to Use?

Postby Gwyneth Huynh 1J » Sun Mar 18, 2018 12:33 am

Use w=-PdeltaV for irreversible systems (constant P) and use w = -nRTln (V2/V1) for reversible processes when P is not constant.

Troy Tavangar 1I
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

Re: Work Equations: Which One to Use?

Postby Troy Tavangar 1I » Sun Mar 18, 2018 12:48 am

The first is for irreversible reactions and the latter is for reversible reactions.


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