What is the maximum efficiency of a heat engine that operates between a high thermal reservoir at 500oC and a low therma

[answerhappygod]

What is the maximum efficiency of a heat engine that operates
between a high thermal reservoir at 500oC and a low thermal
reservoir at 10oC? [5 marks]
b) Consider a heat engine operating between a high thermal
reservoir at 500oC and a low thermal reservoir at 10oC, and
producing 325 kW of work while rejecting 200 kW of waste heat to
the low thermal reservoir. What is the second law efficiency of
this heat engine? [5 marks]
c) In a condenser, saturated water vapour flows through cool
water pipes, condenses on the surface of the cooling pipes and
leaves the condenser as saturated liquid. Cooling water enters the
4-cm-diameter thin copper tubes at an average velocity of 3m/s and
at 10oC, and leaves the condenser at 25oC. Saturated vapour at the
inlet is at 80oC. What is the mass flow rate of the saturated
vapour? [10 marks]