steam flows steadily into a turbine at the rate of 25,000 kg/hr. the steam enters at 8 mpa and 450 c and leaves as a saturated vapor at 50 kpa. the rate of heat transfer from the turbine is 1,250,000 kj/hr. the air surrounding the turbine is a constant 25 c. find a) the power output in mw and b) the rate of entropy generation for the process in kw/k.