Studies of thermodynamic, thermophysical and partial molar properties of liquid mixtures of diethylenetriamine with alcohols at 293.15 to 313.15 K

Abstract

This paper presents densities, ρ speeds of sound, u and viscosities η of the binary liquid mixtures containing diethylenetriamine with 1-hexanol, 1-octanol and 1-decanol at 293.15, 298.15, 303.15, 308.15 and 313.15K. From density and speed of sound data, excess molar volumes, VmE and deviations in isentropic compressibility, ∆κS and speed of sound, ∆u have been evaluated. Viscosity data were used to compute deviations in viscosity and excess Gibbs energy of activation of viscous flow, ΔG⁎E at 298.15, 303.15 and 308.15K. A Redlich–Kister type equation was applied to fit the excess molar volumes and deviations in isentropic compressibility, speed of sound and viscosity data. The viscosity data have been correlated with the equations of Grunberg–Nissan, Tamura–Kurata, Heric–Brewer and of Hind et al. Furthermore, apparent molar volume, V¯φ,i and partial molar volume, V¯φ,i0 of amine in cosolvent alcohol in terms of mole fraction concentration unit have been calculated.