Refrigerant-134a enters the condenser of a residential
heat pump at 800 kPa and 508C at a rate of 0.022 kg/s and
leaves at 750 kPa subcooled by 38C. The refrigerant enters
the compressor at 200 kPa superheated by 48C. Determine
(a) the isentropic efficiency of the compressor, (b) the rate
of heat supplied to the heated room, and (c) the COP of the
heat pump. Also, determine (d ) the COP and the rate of heat
supplied to the heated room if this heat pump operated on the
ideal vapor- compression