Superheated steam at 80 bar absolute and 500°C flows at a rate of 243 kg/min to an adiabatic turbine, where it expands to 5 bar. The turbine outputs 1450 kW of work. From the turbine the steam flows to a heater, where it is reheated isobarically to its initial temperature. Write an energy balance on the turbine and use it to determine the outlet stream temperature