Excess volumes, viscosities, enthalpies, and Gibbs free energies for mixtures of methyl isobutyl ketone + n-pentanol and methyl isobutyl ketone + isoamyl alcohol at 298.15 K

Three excess functions (molar volumes, viscosities, and molar enthalpies) for the methyl isobutyl ketone + n-pentanol and methyl isobutyl ketone + isoamyl alcohol systems at 298.15 K were calculated from measured densities, viscosities, and enthalpies, respectively. The UNIFAC group contribution method was used in order to estimate the activity coefficients which were then employed to calculate the excess molar Gibbs free energy. An attempt to explain the experimental results in terms of molecular interactions was made.