4. (12 points) H2O enters a steadily operating, adiabatic turbine at 100 bar, and 600 °C and leaves at 100kPa. The isentropic efficiency of this turbine is 78%. The mass flow rate through this turbine is 8.5 kg/s. (4a). (4p) Please determine the temperature, specific enthalpy, and specific entropy of water at exit. (4b). (4p) Please determine the power output of this turbine. (4c). (4p) Please determine the rate of entropy production.

Fig: 1

Fig: 2

Fig: 3

Fig: 4