An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Trouton's rule
  رزن ِ تروتون  
razan-e Trouton
Fr.: règle de Trouton  

The ratio of the → molar heat of vaporization of any liquid to its → boiling point is a constant, about 88 joules per mole per Kelvin. The rule is equivalent to the statement that the → entropy of vaporization is constant. It is not always followed, especially by liquids such as water in which hydrogen bonding occurs between the molecules.

See also: Named after Frederick Thomas Trouton (1863-1922), an Irish physicist; → rule.