Jalal Basiri Parsa - Faculty of Chemistry, Bu-Ali Sina University, Hamedan ۶۵۱۷۸, Iran
Fatemeh Ebrahimi - Faculty of Chemistry, Bu-Ali Sina University, Hamedan ۶۵۱۷۸, Iran

Density, viscosity and refractive indices ( D n ) of binary and ternary mixture of propylacetate + 2-butanol + 2- pentanol and their binary systems (propylacetate + 2-butanol), (2-butanol +2-pentanol) and (propylacetate + 2-pentanol) have been studied at 298.15 K and atmospheric pressure. From the experimental data, the excess molar volumes (V E ), viscosity deviation (Dh ), and absolute synergies of refractive index deviation (D D n ) have been calculated. These results have been correlated with the Redlich-Kister equation for the binary mixtures and with the Cibulka equation for the ternary mixture, as a function of mole fraction. Refractive indices have been compared with those predicted by several mixing rules: Lorentz–Lorenz, Gladstone–Dale, Arago–Biot, Heller, and Laplace. Finally, a linear relation between van der Waal's parameter (b) and molar refraction (Rm) has been provided and the refractive indices have been predicted in terms of root mean square deviations.

thermodynamic, ternary, binary, propylacetate, 2-butanol, 2-pentanol