Exam-style question
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What is the primary function of a reversed heat engine?.
- A.To convert thermal energy into mechanical work
- B.To transfer heat from a cold reservoir to a hot reservoir
- C.To generate electricity from heat
- D.To increase the temperature of a gas
Model answer
What a good answer should say
- To transfer heat from a cold reservoir to a hot reservoir
Explanation
Why this works
A reversed heat engine operates by transferring heat from a cold area to a hot area, which is the principle behind refrigerators and heat pumps.
Common mistake
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