A Steam turbine produces power W'= 3000 hp from a mass flux m'= 20000 lb/hr. The steam enters at Temperature T1= 810.78 K and Pressure P1= 800 psi, and exits at Pressure P2= 2 psi. Calculate the efficiency of the turbine. (The efficiency is determined by the ratio of the actual work output Wa to the ideal work output Ws) The Ideal work output corresponds to an constant-entropy process.