**Problem 7-27:**Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated liquid–vapor mixture at a pressure of 140 kPa. The refrigerant absorbs 180 kJ of heat from the cooled space, which is maintained at -10°C, and leaves as saturated vapor at the same pressure. Determine (a) the entropy change of the refrigerant, (b) the entropy change of the cooled space, and (c) the total entropy change for this process.

The entropy is a quantity that measures randomness in a system. Entropy can also be defined as how…

7-27 Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated liquid-vapor mixture at a pressure of 140 kPa. The refrigerant absorbs 180 kJ of heat leaves as saturated vapor at the same pressure. Determine from the cooled space, which is maintained at -10°C, and from the cooled space, which is maintained at leaves as saturated vapor at the same pressure. Determine (a) the entropy change of the refrigerant, (b) the entropy change of the cooled space, and (c) the total entropy change | for this proces.

7-27 Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated liquid-vapor mixture at a pressure of 140 kPa. The refrigerant absorbs 180 kJ of heat leaves as saturated vapor at the same pressure. Determine from the cooled space, which is maintained at -10°C, and from the cooled space, which is maintained at leaves as saturated vapor at the same pressure. Determine (a) the entropy change of the refrigerant, (b) the entropy change of the cooled space, and (c) the total entropy change | for this proces.