A system is operating at a steady state. Find the rate of at which entropy is generated inside the system for each of the following cases.

A. The system is adiabatic. 100 kg/min of saturated steam enters at 5 bar and 100 kg/min of saturated steam leaves at 1 bar.

B. The system is adiabatic. 100 kg/min of saturated liquid water enters at 1 bar and 100 kg/min of liquid water leaves at T = 120°C and P = 10 bar.

C. The system is closed. 1000 kJ/s enter the system at a boundary where T = 1000 K, and 750 kJ/s exit the system at a boundary where T = 500 K.

D. The system is closed. 1000 kJ/s enter the system at a boundary where T = 1000 K, and 500 kJ/s exit the system at a boundary where T = 750 K.