1. A 4-L jug of milk at 25?C is placed in your refrigerator, where it is cooled down to the refrigerator's inside constant temperature of 5?C. Assume the milk has the property of liquid water and find the entropy change of the milk.
2. A constant pressure container of 1.2 kg steel contains 1.5 kg of R-134a at 40C, 500 kPa. The container is placed in a refrigerator that brings it to -20?C. Find the process heat transfer and the combined steel and R-134a change in entropy.