Correlation of calorimetric data of isoamyl acetate plus primary and secondary alcohols (C1–C4) by Redlich–Kister, NRTL and UNIQUAC models at 298.15 K

Calorimetric measurements were performed for six binary mixtures of isoamyl acetate + alcohols (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol and 2-butanol) by a Parr 1455 solution calorimeter over the entire composition range at T = 298.15 K and atmospheric pressure. The results were applied to calculate excess molar enthalpies H m E and excess partial molar enthalpies H i E . The H m E values were positive over the whole of composition range and become more positive with increasing the chain length and steric hindrance of the alkanols. The trend of the H m E data was interpreted in terms of the self-association of pure alkanols, dipole–dipole interactions between ester molecules and cross-association between unlike molecules (ester–alkanol). The correlations of experimental data were performed by Redlich–Kister equation and NRTL and UNIQUAC models.