7) A vapor compression refrigeration system circulates refrigerant-134a at a rate of 0.1 kg/s. The refrigerant enters the compressor at -10C and 140 kPa, and exits at 700 kPa. The isentropic efficiency of compressor is 67%. There are no pressure drops as the refrigerant flows through the condenser and evaporator. The refrigerant leaves the condenser at 700 kPa and 24C. Determine the cooling capacity of the refrigerator, and the coefficient of performance. 8) A heat pump using refrigerant-134a operates its condenser at 700 kPa and its evaporator at -4C. It operates on the ideal vapor-compression refrigeration cycle, except for the compressor, which has an isentropic efficiency of 82%. How much this compressor irreversibility reduce this heat pump's COP as compared to an ideal vapor compression refrigeration cycle?