Exam-style question
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How does a reversed heat engine function in terms of energy transfer?.
- A.It converts work into heat energy.
- B.It absorbs heat from a cold reservoir and expels it to a hot reservoir.
- C.It generates work from thermal energy.
- D.It maintains a constant temperature by absorbing energy.
Model answer
What a good answer should say
- It absorbs heat from a cold reservoir and expels it to a hot reservoir.
Explanation
Why this works
A reversed heat engine, such as a refrigerator or heat pump, operates by absorbing heat from a cold area and transferring it to a warmer area, effectively moving thermal energy against its natural flow.
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