A sample of 1.75 moles of H2 (Cv = 20.5 J K-1mol-1) at 21oC and 1.50 atm

Question:

A sample of 1.75 moles of H2 (Cv = 20.5 J K-1mol-1) at 21oC and 1.50 atm undergoes a reversible adiabatic compression until the final pressure is 4.50 atm. Calculate the final volume of the gas sample and the work associated with this process. Assume that the gas behaves ideally.