A rigid tank contains 3.2 kg of refrigerant-134a initially at 26oC and 140 kPa. The refrigerant is

Question:

A rigid tank contains 3.2 kg of refrigerant-134a initially at 26oC and 140 kPa. The refrigerant is now cooled until its pressure drops to 100 kPa. Determine
(a) The entropy change of the refrigerant.
(b) The entropy transfer to a reservoir at -50oC.
(c) The entropy generation in the universe due to the process.