1. Derive a relationship between the efficiency of a Carnal engine and the coefficient of performance of the same engine when operated as a refrigerator. Is a Combat engine whose efficiency is very high particularly suited as a refrigerator? Give reasons for your answer.
2. An Ideal gas for which cv 3R/2 is the working substance of a Carnal engine. During the isotherm" I expansion the volume doubles. The ratio of the final volume 10 the initial volume in the adiabatic expansion is 5.7. The work output of the engine is 9 x 105 J in each cycle. Compute the temperature of the reservoirs between which the engine operates.
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