Ž . Fluid Phase Equilibria 145 1998 115–128 Densities and excess molar volumes of the ternary mixture Ž . 1-butanol q n-hexane q 1-chlorobutane at 298.15 and 313.15 K. Application of the ERAS model M. Domınguez ) , H. Artigas, J. Santafe, A. Mainar, J.S. Urieta ´ ´ Departamento de Quımica Organica – Quımica Fısica, Area de Quımica Fısica, Facultad de Ciencias, Seccion de Quımicas, ´ ´ ´ ´ ´ ´ ´ ´ UniÕersidad de Zaragoza, Ciudad UniÕersitaria, Plaza San Francisco s r n, 50009-Zaragoza, Spain Received 23 June 1997; accepted 22 September 1997 Abstract Ž . Ž . Densities of the liquid mixtures n-hexane q 1-chlorobutane and 1-butanol q n-hexane q 1-chlorobutane have been measured by the vibrating tube technique at 298.15 K and 313.15 K. With these densities, excess molar volumes were calculated. An extended version of the so-called ERAS model has been used for describing V E of the complete ternary system at 298.15 K. Qualitatively the ERAS-model gives an adequate representation of this system, being similar the shapes of both the experimental and the predicted curves. q 1998 Elsevier Science B.V. Keywords: Densities; Excess volumes; Mixture; ERAS model; 1-butanol; n-hexane; 1-chlorobutane 1. Introduction Recently, we have reported experimental excess molar volumes of binary and ternary liquid w x mixtures 1,2 containing associated compounds, hydrocarbons and halohydrocarbons. In this work we Ž . report the excess volumes for the ternary mixture 1-butanol q n-hexane q 1-chlorobutane and for Ž . the binary mixture n-hexane q 1-chlorobutane at 298.15 K and 313.15 K. The excess molar volumes together with literature excess enthalpies at 298.15 K for the three binary liquid mixtures Ž . involved have been used in applying the extended real associated solution ERAS model. ) Corresponding author. 0378-3812r98r$19.00 q 1998 Elsevier Science B.V. All rights reserved. Ž . PII S0378-3812 97 00293-8