A cylinder fitted with aa frictionless piston contains an ideal gas at temperature T and pressire P. The gas exapnds isothermally and reversibly until the pressure is p/3. Ehich statement is true regarding the work done by the gas during expansiona. Equal to the heat absorbed by the gas. b. Equal to the internal energy change of the gas. c Equal to the enthalpy change of the gas. d. Equal to 11 P time the volume change in the gas. e. Greater than the heat absorbed by the gas