1 Refrigerant 134a enters the evaporator of a refrigeration system as a saturated liquid-vapor mixture at 140 kPa. The refrigerant absorbs 180 kJ of heat from the refrigerated space,which is maintained at -10C, and leaves as a saturated vapor at the same pressure. Determine (a) the entropy change of the refrigerant, (b) the entropy change of the refrigerated space, and (c) the total entropy change of this process