INVESTIGATION FOR EXCESS GIBBS FREE ENERGIES OF ALCOHOLIC SOLUTIONS BY INFRARED SPECTROSCOPIC STUDY

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  • SASSA YOSHIMASA
    Department of Chemical Engineering, Faculty of Engineering Science, Osaka University
  • KATAYAMA TAKASHI
    Department of Chemical Engineering, Faculty of Engineering Science, Osaka University

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  • EFFECTS OF ASSOCIATION BETWEEN UNLIKE MOLECULES

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Hydrogen bondings between alcohol and active solvent are studied by infrared spectroscopy, and the equilibrium constants are evaluated for the sixteen systems. Using these values and self-association constants of alcohols, activity coefficients for alcohol-active solvent systems are calculated by the associated solution theory of Flory type. These calculated activity coefficients are compared with experimental values obtained from vapor-liquid equilibrium measurements.<br> From the results, it is found that the spectroscopic information is useful for evaluation of contributions to the nonideal behavior of vapor-liquid equilibria for these systems.<br> Moreover, the correlations between hydrogen-bond shifts and thermodynamic excess functions (GE, HE, VE) for equipmolar mixtures are discussed.

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