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Maxwell's demon: A gedankenexperiment in which information is used to reduce the entropy of a thermodynamic system; often described as a paradox in relation to the second law of thermodynamics. [e]

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Parent topics

  • Thermodynamics [r]: The statistical description of the properties of molecular systems [e]
  • Second law of thermodynamics [r]: Entropy S is a state variable of a thermodynamic system; when a system of temperature T absorbs heat DQ reversibly, then dS = DQ/T; during an irreversible (spontaneous) state change dS > DQ/T. [e]
  • James Clerk Maxwell [r]: (1831 – 1879) Scottish physicist best known for his formulation of electromagnetic theory and the statistical theory of gases. [e]

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