Excess Gibbs energy of (formic acid + benzyl alcohol) and acetic acid + benzyl alcohol)

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Vapour pressures have been measured by the isoteniscope method of (acetic acid + benzyl alcohol) between 298.15 and 318.15 K and of (formic acid + benzyl alcohol) between 293.15 and 318.15 K. The excess molar Gibbs energies GmE were evaluated by numerical integration of the Gibbs-Duhem equation taking into consideration the dimerization of carboxylic acids in the vapour phase. The mixture with acetic acid shows positive deviations from ideality and a decrease with temperature in the asymmetry of GmE with respect to the mole fraction. Behaviour of the excess Gibbs energy for (formic acid + benzyl alcohol) is complex. With increase of temperature GmE(x) gradually develops into an inverted S-shaped curve.

Original languageEnglish
Pages (from-to)891-895
Number of pages5
JournalJournal of Chemical Thermodynamics
Issue number9
StatePublished - 1 Jan 1984

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Physical and Theoretical Chemistry


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