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Q:

The coefficient performance of a refrigerator is 5. If the temperature inside the freezer is -20℃, calculate the heat rejected to the surrounding

  • 1
    110C
  • 2

    410C

  • 3

    210C

  • 4

    310C

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Answer : 1. "110C"
Explanation :

A heat pump is a heat engine working in reverse direction. A refrigerator is basically a heat pump, which is used to pump heat (absorbed from materials at lower temperatures inside the refrigerator) to the surroundings at higher temperatures. The coefficient of performance of a refrigerator is defined as the ratio of heat removed

Why

2

Energy from inside the refrigerator per cycle

w

given per cycle for heat removal,

α

,

Why

2

,

w

,

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