P3D.1 A perfect gas is contained in a cylinder of fixed volume and which is separated into two sections A and B by a frictionless piston; no heat can pass

through the piston. Section B is maintained at a constant temperature of300 K; that is, all changes in section B are isothermal. There are 2.00 mol of gas molecules in each section and the constant-volume heat capacity of the gas is Cy = 20J K'mol", which can be assumed to be constant. Initially T= T, = 300K, V,= V, 2.00 dm'. Energy is then supplied as heat to Section Aso that the gas in A expands, pushing the piston out and thereby compressing