Calculate the irreversibility for the air is at 300 kPa, 17°C with a volume of 0.25 m^{3}, while at the stops V = 1 m^{3}. An air line, 500 kPa, 600 K, is connected by a valve that is then opened until a final inside pressure of 400 kPa is reached, at which point T = 350 K. assuming that heat transfer is with the surroundings at 17°C.