4) Steam enters a turbine with a pressure of 30 bar, a temperature of 400C and a velocity of 160 m/s. Saturated vapor at 100 C exists with a velocity of 100 m/s. At steady state, the turbine develops work equal to 540 kJ/kg. Heat transfer between the turbine and surrounding occurs at an average surrounding temperature of 25 C. A) Determine the entropy generation rate per kg of steam. B) Draw the process on T-s diagram.