Steam Enters a Turbine Steadily at 4 MPa and 400°C

Multiple Choice

Steam enters a turbine steadily at 4 MPa and 400°C and exits at 0.2 MPa and 150°C in an environment at 25°C. The decrease in the exergy of the steam as it flows through the turbine is

A) 0 kJ/kg
B) 445 kJ/kg
C) 458 kJ/kg
D) 1921 kJ/kg
E) 597 kJ/kg