Work Done Calculation: Cylinder Piston System

[gracy]

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?

 

[Suraj M]

You can use this formula for work anytime( as far as i know). Other equations can be derived from this depending on whether its isothermal/adiabatic. You got to play around with the basic equation to match the data you have.
Be careful when you come across processes with varying pressure.