Measurement and study on the thermodynamic properties of binary systems of propylacetate, 2-butanol and 2-pentanol at T=298.15K.

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.

Keywords:

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