Two moles of nitrogen gases are contained in an adiabatic system. The

initial volume and pressure of the nitrogen gases is 30 liters and 200 kPa, respectively,

while the final state of the nitrogen gases is 60 liters. The isobaric heat capacity is 2.5

R. Please calculate the temperature and pressure of the final state, the work done to

the system during the process, and the change of internal energy and enthalpy during

the process.