Experimental data and modeling for excess enthalpies of 2-Pentanol with n-alkanes (C7–C9) at T = (293.15, 298.15 and 303.15) K

Abstract

Excess molar enthalpies, HE, for the binary mixtures of 2-pentanol with n-alkanes(n-heptane, n-octane, and n-nonane) have been determined at three different temperatures T = (293.15, 298.15 and 303.15) K and normal atmospheric pressure over the entire composition range using a Calvet microcalorimeter. All mixtures show endothermic mixing with the maximum values of the excess enthalpies occurring in the n-alkane-rich region. The HE data are smoothed using Redlich–Kister equation. The applicability of the Treszczanowicz–Benson, ERAS,Renon–Prausnitz and Chen–Bagley models to correlate HE of studied mixtures is tested, and the agreement between experimental and theoretical results is satisfactory. Each model includes a self-association equilibrium constant that represents hydrogen bonding and an adjustable parameter that reflects physical interactions.