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Thermodynamics for W

Posted: Sat Mar 18, 2017 1:13 am
by Guillermo Vega 1H
I don't really understand when we should compute with the formula w=-nRTln(V2/V1). Is this for only isothermal expansions or are there other situations in which we can use the formula?

Re: Thermodynamics for W

Posted: Sat Mar 18, 2017 1:14 am
by ntruong2H
Guillermo Vega 1H wrote:I don't really understand when we should compute with the formula w=-nRTln(V2/V1). Is this for only isothermal expansions or are there other situations in which we can use the formula?


Use this formula when pressure is not constant.

Re: Thermodynamics for W

Posted: Sun Jan 28, 2018 6:25 pm
by Manasvi Paudel 1A
You use that equation when pressure is not constant. -PdeltaV is used when pressure is constant.

Re: Thermodynamics for W

Posted: Sun Jan 28, 2018 7:27 pm
by Ozhen Atoyan 1F
To add onto the previous post, I believe you utilize this equation only when you have an isothermal reversible expansion.