A 1-m3 tank containing air at 25?C and 500 kPa is connected through a valve to another tank containing 4 kg of air at 60?C and 200 kPa (Fig. P3.232). Now the valve is opened and the entire system reaches thermal equilibrium with the surroundings at 20?C. Assume constant specific heat at 25?C and determine the final pressure and the heat transfer.
