A Carnot Heat Engine Runs Between a Cold Reservoir at Temperature

question 15

Multiple Choice

A Carnot heat engine runs between a cold reservoir at temperature T_L and a hot reservoir at temperature T_H.You want to increase its efficiency.Of the following, which change results in the greatest increase in efficiency? The value of $\Delta$ T is the same for all changes.

• A)Raise the temperature of the hot reservoir by \(\Delta\)T
• B)Raise the temperature of the cold reservoir by \(\Delta\)T
• C)Lower the temperature of the hot reservoir by \(\Delta\)T
• D)Lower the temperature of the cold reservoir by \(\Delta\)T
• E)Lower the temperature of the hot reservoir by (1/2)\(\Delta\)T and raise the temperature of the cold reservoir by (1/2)\(\Delta\)T

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