The work done on the surroundings by a system when a gas expands reversibly from volume V1 to V2, while the external pressure p is adjusted so as to be constant, is given by
W(rev) = - integral of pdV between V1 and V2
calculate the work done for the expansion of n moles of a perfect gas at constant temperature, i.e under isothermal conditions
I have no idea how to do this, any help please?