Thermodynamic properties of mixing for (1-alkanol plus a n-alkane plus a cyclic alkane) at T=298.15 K. I. (n-Hexane plus cyclohexane plus 1-butanol)

Experimental values of density, refractive index and speed of sound of (hex ane + cyclohexane + 1-butanol) were measured at T = 298.15 K and atmospheri c pressure. From the experimental data, the corresponding derived propertie s (excess molar volumes, changes of refractive index on mixing and changes of isentropic compressibility) were computed. Such derived values were corr elated using several polynomial equations. Several empirical methods were u sed in the calculation of the properties of ternary systems from binary dat a. The Nitta-Chao group contribution model was applied to predict excess mo lar volume for this mixture. (C) 2001 Academic Press.