Biogas with a composition of 40% CH4 and the rest CO2 is used to produce steam to be fed to a steam turbine at 160 bar and 560
C

(H53465.4 kJ/kg). The exhaust steam is recovered at 0.08 bar and 41.5
C (H52577 kJ/kg); it must be reheated to the feed conditions.

Compute the efficiency of the plant that produces 25 kcal per mol of biogas and the flow of steam generated.