Excess molar enthalpies, H-E, 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 H-E data are smoothed using Redlich-Kister equation. The applicability of the Treszczanowicz-Benson, ERAS, Renon-Prausnitz and Chen-Bagley models to correlate H-E of studied mixtures is tested, and the agreement between experimental and theoretical results is satisfactory. Each model indudes a self-association equilibrium constant that represents hydrogen bonding and an adjustable parameter that reflects physical interactions. (C) 2020 The Chemical Industry and Engineering Society of China, and Chemical industry Press Co., Ltd. All rights reserved.