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

Alexander Apelblat; Abraham Tamir; Moshe Wagner

doi:10.1016/0021-9614(84)90037-5

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

Alexander Apelblat, Abraham Tamir, Moshe Wagner

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

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 G_m^E 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 G_m^E with respect to the mole fraction. Behaviour of the excess Gibbs energy for (formic acid + benzyl alcohol) is complex. With increase of temperature G_m^E(x) gradually develops into an inverted S-shaped curve.

Original language	English
Pages (from-to)	891-895
Number of pages	5
Journal	Journal of Chemical Thermodynamics
Volume	16
Issue number	9
DOIs	https://doi.org/10.1016/0021-9614(84)90037-5
State	Published - 1 Jan 1984

ASJC Scopus subject areas

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

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title = "Excess Gibbs energy of (formic acid + benzyl alcohol) and acetic acid + benzyl alcohol)",

abstract = "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.",

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T1 - Excess Gibbs energy of (formic acid + benzyl alcohol) and acetic acid + benzyl alcohol)

AU - Apelblat, Alexander

AU - Tamir, Abraham

AU - Wagner, Moshe

PY - 1984/1/1

Y1 - 1984/1/1

N2 - 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.

AB - 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.

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DO - 10.1016/0021-9614(84)90037-5

M3 - Article

AN - SCOPUS:48549108263

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IS - 9

ER -

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

Abstract

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