English

Noun

Maxwell’s demon ‎(plural Maxwell's demons)

1. A hypothetical creature created for a thought experiment. Maxwell’s demon, if it existed, would act as a sort of gate guard by sorting between higher-energy molecules and lower-energy molecules within an enclosed space. Because such a sorting process would tend to decrease entropy, it would violate the second law of thermodynamics.

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See also

• Second_law_of_thermodynamics on Wikipedia.Wikipedia
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