An ideal gas at 300k has a volume of 15 liters at 15atm. calculate the final volume of the system, the work done by the system, the heat entering or leaving the system, the change in internal energy and the change in the enthalpy when the gas undergoes a. a reversible isothermal expansion to a pressureof 10 atm. b a reversible adiabatic expansion to a pressure of 10 atm.