2. Refrigerant 134a enters the coils of the evaporator of a refrigeration system as a saturated liquid-vapour mixture at a pressure of 180kPa. The refrigerant absorbs 160kJ of heat from the cooled space, which is maintained at 8C and leaves as a saturated vapour at the same pressure. Determine a) The temperature of the refrigerant (K) b) The entropy changes of the refrigerant (kJ/K) c) The entropy changes of the cooled space (kJ/k) d) The total entropy changes for this process (kJ/K)