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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.