A 0.4m3 rigid tank initially contains refrigerant-134a at 14 degree C. At this state, 70% of the mass is in the vapour phase, and the rest in the liquid phase. The tank is connected by a valve to a supply line where refrigerant at 1 MPa and 100 degree C flows steadily. Now the valve is opened slightly, and the refrigerant is allowed to enter the tank. When the pressure in the tank reaches 700 kPa, the entire refrigerant in the tank exists in the vapour phase only. At this point the valve is closed. Determine The final temperature in the tank The mass of refrigerant that has entered the tank The heat transfer between the system and the surroundings.