(Solved): 7-31 Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated li ...

7-31 Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated liquid-vapor mixture at a pressure of

. The refrigerant absorbs

of heat from the cooled space, which is maintained at

, 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.