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  • .... Entropy never decreases in a reaction, according to the <b>second law of thermodynamics</b>. See [[Special:MyLanguage/Dictionary:thermodynamic_functions|''thermody
    422 bytes (56 words) - 17:08, 5 February 2017
  • ...rgy. The second law states that a cyclic heat engine requires a difference of temperature over which to operate. These laws may be expressed as
    414 bytes (70 words) - 13:44, 13 November 2018