A steam turbine inlet is at 1200 kPa and 500 C. The actual exit is at 300 kPa having an actual work of 407 kJ/kg. Find its second law efficiency?

A steam turbine inlet is at 1200 kPa and 500 C. The actual exit is at

1.	A steam turbine inlet is at 1200 kPa and 500 C. The actual exit is at 300 kPa having an actual work of 407 kJ/kg. Find its second law efficiency?
A.	0.88
B.	0.98
C.	0.78
D.	0.68
Answer» C. 0.78