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## Main Question or Discussion Point

In numerical of calculation of work done by/on the system (cylinder piston )

the formula used Work=± p(external pressure)multiplied by change in volume

I want to ask should temperature be constant to apply this formula?I mean is this formula applicable only in isothermal condition?

the formula used Work=± p(external pressure)multiplied by change in volume

I want to ask should temperature be constant to apply this formula?I mean is this formula applicable only in isothermal condition?