7) Steam enters a turbine at a pressure P1=2.0MPa, temperature T1=500C and enthalpy h1=3062kJ/kg with a velocity v1=10m/s. The steam leaves the turbine as a gas-liquid mixture at a pressure P2=101kPa, temperature T2=373K, and enthalpy h2=2621kJ/kg with a velocity of v2=50m/s. Thermal energy is lost through the turbine walls at a rate of 5kJ/hr. The elevation difference between the entrance and exit of the turbine can be neglected. Calculate the power output in units of kW if 4000kg/r of steam pass through the turbine