An operating test of a steam turbine produces the following results. With steam supplied to the turbine at 1350 Wa and 648.15 K (375"C), the exhaust from the turbine at 10 kPa is saturated vapor. Assuming adiabatic operation and negligible changes in kinetic and potential energies, determine the turbine efficiency, i.e., the ratio of actual work of the turbine to the work of a turbine operating isentropically from the same initial conditions to the same exhaust pressure.