Question

What is an entropy? ? ? ​

Answer 1

Answer:

Entropy, the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work.

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Answer 2

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Entropy, the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion, the amount of entropy is also a measure of the molecular disorder, or randomness, of a system.