Discussion
The Clausius statement of the second law forbids
Answer: B
Correct answer: heat passing from a colder to a hotter body unaided
Clausius’s statement is that no process can have as its sole result the transfer of heat from a colder to a hotter body. The words “sole result” matter: a refrigerator does exactly that transfer, but not as its only result - work is consumed. Entropy of a *system* may certainly decrease, as it does in the refrigerated space; it is the total that cannot.
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