A 0.3 m' rigid tank initially contains refrigerant- 134a at 14°C. At this state, 55 percent of the mass is in the vapor phase, and the rest is in the liquid phase. The tank is connected by a valve toa supply line where refrigerant at 1.4 MPa and 100°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 1MPa, the entire refrigerant in the tank exists in the vapor phase only. At this point the valve is closed. Determine the heat transfer between the system and the surroundings. In kJ.