A 1m3 tank contians air at 0.1MPa and 20 degree C. A high-pressure line is connected to the tank until the pressure reaches 2MPa. Assuming that the tank and the connecting valve are adiabatic, calculate the final temperature in the tank if the conditions in the high-pressure line remain constant at 2 MPa and 35 degree C. How much cooling to the tank is necessary to maintain the air temperature constant at 20 degree C. (Ideal Gas, Constant CP & CV , CP = 1.0035 kJ/(kg K) , CV = 0.7165 kJ/(kg K) )