13-55 tank that contains 1 kg of O, at 15°C and 300 kPa is connected to a 2-m un insulated tank that contains N, at 50°C and 500 kPa. The

valve connecting the two tanks is opened, and the two gases form a homogeneous mixture at 25°C. Determine (a) the final pressure in the tank,(b) the heat transfer, and (c) the entropy generated during this process. Assume T, 25°C.