The power output of the turbine in MW is

Question

Steam enters an adiabatic turbine operating at steady state with an enthalpy of 3251.0kJ/kg and leaves as a saturated mixture at 15 kPa with quality (dryness friction) 0.9. The enthalpies of the saturated liquid and vapor at 15 kPa are h_f = 225.94kJ/kg and h_g = 2598.3kJ/kg respectively. The mass flow rate of steam is respectively. The mass flow rate of steam is 10kg/s. Kinetic and potential energy changes are negligible. The power output of the turbine in MW is                                                                                                                         

      (a) 6.5                                                                 (b) 8.9

      (c) 9.1                                                                 (d) 27.0