A refrigerator works by
- A. creating cold and pumping it into the cabinet
- B. using work to move heat from a cold interior to the warmer room
- C. destroying heat inside the cabinet
- D. lowering the entropy of the universe
Explanation
Heat does not flow from cold to hot on its own, so a compressor does work to drive it that way, which is why the pipes at the back of the fridge feel warm. There is no such thing as cold to pump; only heat is moved. The room as a whole ends up warmer, because the energy removed plus the work done is all dumped into it.
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