Thermodynamics of (ketone+amine) mixtures. Part XI. Excess molar enthalpies at T = 298.15K for the (1-propanol+ N,N,N -triethylamine+2-butanone) system

Abstract Molar excess enthalpies, H m E , measured by means of a Tian-Calvet microcalorimeter, for the ternary system {1-propanol +  N,N,N -triethylamine (TEA) + 2-butanone} at T  = 298.15 K are reported. Values of H m E for the constituent binaries are available in the literature. The data are interpreted in terms of different interactional contributions to H m E . The coefficients of the corresponding fittings of binary and ternary H m E values have been used to determine the partial molar excess enthalpies of each component. It is concluded that 1-propanol and TEA molecules can participate in interactions between unlike molecules, and that 2-butanone is mainly a breaker of interactions between like molecules. The DISQUAC model is applied, using binary parameters only, for the H m E prediction of the ternary mixture investigated. Large differences between experimental values and theoretical results show the existence of ternary interactions.