Excess molar enthalpies (H-E) of binary mixtures of 2-decanone or dipentyl ether with n-alkanes, including n-dodecane, n-tetradecane, and n-hexadecane, were measured with an isothermal titration calorimeter (ITC) at T=298.15 K under atmospheric pressure. All the measured H-E values are positive over the entire range of composition, indicating that all these mixing processes are endothermic. The H-E values varying with composition are found to be nearly symmetric for each binary system. It was also shown that the H-E values follow the order of n-hexadecane > n-tetradecane > n-dodecane at a given composition in either the 2-decanone or dipentyl ether binary systems. An empirical Redlich-Kister equation correlated quantitatively these new H-E data. The Peng-Robinson and the Patel-Teja equations of state, and the NRTL model were also applied to fit the H-E results. Among these tested correlative models, the Patel-Teja equation of state with two adjustable binary interaction parameters generally yielded the best representation. (C) 2010 Elsevier Ltd. All rights reserved.