When to use this equation

[sofiakavanaugh]

Hi,

I was wondering in what specific situations we would need to use w=-pdeltaV versus other work equations

Does the temperature need to be constant?

Thanks!

[Aijun Zhang 1D]

When the pressure is constant, we use w = -Pext

When temperature is constant (isothermal), we use w = -nRT ln (Vfinal/Vinitial)

[Nha Dang 2I]

w = -nRT ln (Vfinal/Vinitial) is also used when the pressure is not kept at a constant.

[snehabhargava]

That equation is used when the pressure is constant.

[McKenna disc 1C]

When the pressure is constant, we use w = -Pext

When temperature is constant (isothermal), we use w = -nRT ln (Vfinal/Vinitial)

Are these the only two scenarios we'll likely be dealing with? Thanks!