Question: In each cycle, an engine removes 150 J from a reservoir at 100 o C and gives off 125 J to a reservoir at 20oC.

In each cycle, an engine removes 150 J from a reservoir at 100^oC and gives off 125 J to a reservoir at 20oC.

(a) What is the efficiency of this engine?

(b) What is the ratio of its efficiency to that of a Carnot engine working between the same reservoirs? (This ratio is called the second law efficiency.)

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