Superheated steam at 20 mpa, 480°c enters the turbine of a vapor power plant. the pressure at the exit of the turbine is 0.5 bar, and liquid leaves the condenser at 0.4 bar at 75°c. the pressure is increased to 20.1 mpa across the pump. the turbine and pump have isentropic efficiencies of 95 and 85%, respectively. cooling water enters the condenser at 20°c with a mass flow rate of 70.7 kg/s and exits the condenser at 38°c. determine the mass flow rate of the steam.