Refrigerant-134a enters the evaporator coils placed at the back of the freezer section -of...

Refrigerant-134a enters the evaporator coils placed at the back of the freezer section -of a house hold refrigerator at 120 kPa with a quality of 20 percent and leaves at 120 kPa and - 20°e. If the compressor consumes 450 W of power and the COP the refrigerator is 1.2, determine (a) the mass flow rate of the refrigerant and (b) the rate of heat rejected to the kitchen air.