A 3 m3 tank initially contains air at 100 kPa and 25oC. The tank is connected to a supply line at 550 kPa and 25oC. The valve is opened, and air is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. A thermometer placed in the tank indicates that the air temperature at the final state is 65oC. Treating air as a perfect gas, determine.
(a) The mass of air that has entered the tank.
(b) The heat transfer.
(c) The entropy generated.