Volumetric, acoustic, viscometric and spectroscopic studies of binary liquid mixtures containing triethylamine with 1-propanol, 1-butanol and 1-pentanol

Abstract

Densities, speeds of sound and viscosities for the binary liquid mixtures containing Triethylamine with 1-propanol, 1-butanol and 1-pentanol are reported in this article. Densities and speeds of sound were measured at (293.15, 298.15, 303.15 and 308.15) K and 0.1 MPa over the entire range of compositions. Viscosities were measured at (298.15, 303.15 and 308.15) K and 0.1 MPa over whole composition range. The measured data were processed to obtain a number of thermodynamic parameters viz. excess molar volume ($V_m^E$), excess isentropic compressibility (${\kappa }_S^E$), deviation in speed of sound (u^D), deviation in viscosity (Δη), excess Gibb’s free energy of activation for viscous flow ($∆G^{\ast E}$). The parameters were analyzed in the light of intermolecular interactions and various effects on these. Spectroscopic investigations (FTIR) were performed to get more information about happenings at molecular level and to find more support for the results. The computed data along with experimental data were also correlated to compositions using Redlich-Kister type polynomial and Jouyben-Acree model respectively. Some existing models of viscosity (Gurunberg-Nissan model, Tamura-Kurata model, Hind-McLaughlin et al. model, Katti-Chaudhri model, McAllister’s three-body interaction model, Heric-Brewer three-parameters model, McAllister’s four-body interaction model) were tested for their application to studied mixtures.