Find the change in entropy for the system in each of the following processes.

A. The system is 5 kg of initially saturated steam at P = 1 bar, and it is heated isobarically to 300°C.

B. The system is 5 kg of steam, initially at P = 5 bar and T = 300°C, and it is cooled and condensed into saturated liquid at P = 5 bar.

C. The system is 10 moles of an ideal gas with C_V* = 1.5 R, and it is compressed from T = 400 K and P = 1 bar to T = 500 K and P = 3 bar.

D. The system is 10 lb-mol of an ideal gas with C_P* = 3.5 R, and it is expanded from T = 500°F and P = 4 atm to T = 100°F and P = 1 atm.