If the coefficient of performance of a refrigerator is 1, which the following st

Question

If the coefficient of performance of a refrigerator is 1, which the following statements is true? The temperature outside equals the temperature inside of the refrigerator The rate at which heat is removed from the inside equals the rate at which heat is delivered outside. The power consumed by the refrigerator equals the rate at which heat is removed from the inside. The power consumed by the refrigerator equals the rate at which heat is delivered to the outside. To increase the efficiency of an ideal heat engine, one must increase which of the following? the amount of heat consumed per second the temperature of the cold reservoir the temperature of the hot reservoir the size of the cold reservoir the size of the hot reservoir How would you increase the coefficient of performance of an ideal refrigerator? Increase the mechanical work input. Decrease the outside temperature. Decrease the inside temperature. Increase the outside temperature. Why must every heat engine have a cold reservoir? Because it is impossible for even a perfect engine to convert heat entirely into mechanical work. Because the cold reservoir keeps the engine from overheating. Because the cold reservoir keeps the engine from overcooling. Because the cold reservoir increases the power of the engine.

Explanation / Answer

1) The power consumed by the refrigerator equals the rate at which heat is removed from the inside.

2)the temperature of the hot reservoir .

e=1-Tc/Th

3)Decrease the outside temperature.

COP=Tc/Th-Tc

4)Because it is impossible for even a perfect engine to convert heat entirely into mechanical work

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