Estimation of entropy of vaporization: Effect of chain length

Dinesh S. Mishra, Samuel H. Yalkowsky

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


The entropy of vaporization of organic non-hydrogen bonding compounds can be estimated by using the following modifications of Trouton's rule: (1) for rigid molecules, ΔSv = 20 cal/deg·mole; (2) for long chain derivatives of such molecules, ΔSv = 20 + 0.16(n-5) cal/deg·mole, where n is the number of flexible links in the chain, and n > 5. These simple rules provide a good estimation for the entropy of vaporization which is sufficiently accurate to obtain reasonable estimations of vapor pressure.

Original languageEnglish (US)
Pages (from-to)111-117
Number of pages7
Issue number1-2
StatePublished - 1990

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis


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