A Carnot engine operates between temperatures of 650 and
Chapter , Problem 57(choose chapter or problem)
A Carnot engine operates between temperatures of 650 and 350 K. To improve the effi ciency of the engine, it is decided either to raise the temperature of the hot reservoir by 40 K or to lower the temperature of the cold reservoir by 40 K. Which change gives the greater improvement? Justify your answer by calculating the effi ciency in each case
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