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A friend tells you that he knows of a situation in which heat is passed from one body to another ...

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A friend tells you that he knows of a situation in which heat is passed from one body to another ...

A friend tells you that he knows of a situation in which heat is passed from one body to another body with a higher temperature. He explains that he thinks the 2nd law of thermodynamics must have been violated. Is he correct?

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No. If the temperature difference is small enough, heat can spontaneously flow from the cooler to the hotter body.

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Yes. Heat cannot pass from a cooler body to a hotter body.

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No. He forgot that if external work is done on the system this is possible.

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No. The cooler body can give up energy to the hotter body by radioactivity or another natural process.

Textbook

College Physics

Edition: 5^th

Author: Giambattista

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