An monatomic ideal gas at 300 K has a volume of 15 liters at a pressure of 15 atm. Calculate a. The final volume of the system b. The work done by the system c. The heat entering or leaving the system d. The change in the internal energy e. The change in the enthalpy when the gas undergoes i. A reversible isothermal expansion to a pressure of 10 atm ii. A reversible adiabatic expansion to a pressure of 10 atm The constant-volume molar heat capacity of the gas, c v , has the value 1.5 R .