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23. The Second Law of Thermodynamics

Refrigerators

23. The Second Law of Thermodynamics

Refrigerators

Multiple Choice
What is the maximum possible coefficient of performance for a refrigerator operating between 2.0°C (a typical refrigerator temperature) and 20°C (a typical kitchen temperature)?
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Multiple Choice
In the context of refrigerators, what does the coefficient of performance ( $COP$ ) represent?
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Multiple Choice
Which of the following components is primarily responsible for cooling the air inside a household refrigerator?
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Multiple Choice
Which of the following best describes the function of a commercial refrigerator that uses $R - 134 a$ as the working fluid?
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Multiple Choice
Freezing a kilogram of water, initially at 20°C, requires your refrigerator to remove about $417 kJ$ of thermal energy from the water. If the coefficient of performance of your refrigerator is 5.0, how much heat is exhausted into your kitchen when you freeze a kilogram of water?
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Multiple Choice
A refrigerator has a coefficient of performance of 2.4. Each cycle, it takes in 3×10⁴ J of heat from the cold reservoir. How much is expelled to the hot reservoir?
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