Arigid tank whose volume is 0.5 m , initially containing ammonia at 20°c, 1.5 bar, is connected by a valve to a large supply line carrying ammonia at 12 bar, 60°c. the valve is opened only as long as required to fill the tank with additional ammonia, bringing the total mass of ammonia in the tank to 143.36 kg. finally, the tank holds a two-phase liquid-vapor mixture at 20°c. determine the heat transfer between the tank contents and the surroundings, in kj, ignoring kinetic and potential energy effects.

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam 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 temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.