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Trouton's rule states that the entropy of vaporisation at the normal boiling point is

  • A.roughly the same for many liquids
  • B.proportional to the molar mass value
  • C.zero for any ideal liquid
  • D.equal to the heat capacity

Answer: A

A value near eighty-eight joules per mole kelvin holds for many non-associating liquids, which allows a latent heat to be estimated from the boiling point alone. Hydrogen bonded liquids such as water depart noticeably from it.

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