Multiple choice

Against which gradient does a heat pump transfer heat energy from a heat source to a heat sink?

  1. Temperature

  2. Pressure

  3. Volume

  4. Energy

  5. Mass
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A Correct answer
Explanation

A heat pump uses some amount of external high-grade energy to accomplish the desired transfer of thermal energy from heat source to heat sink. So temperature is a measure of the thermal energy per particle of matter or radiation.

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