Thermodynamics Research Center / ThermoML | Thermochimica Acta

ABSTRACT

Densities, a , viscosities, O , and speeds of sound, u, were measured for the binary liquid mixtures containing diethylenetriamine with 2-methyl-1-propanol, 2-propanol and 1-butanol at (293.15, 298.15, 303.15, 308.15 and 313.15 K). From density and speed of sound data, excess molar volumes, E m V , deviations in isentropic compressibility, poundsG S U , and deviations in speed of sound, poundsGu , have been evaluated. Viscosity data were used to compute deviations in viscosity and excess Gibbs free energy of activation of viscous flow ( E G* ' ) at (298.15, 303.15 and 308.15 K). A Redlich-Kister type equation was applied to fit the excess molar volumes, deviations in isentropic compressibility, deviations in speed of sound and deviations in viscosity data. The viscosity data have been correlated with the equations of Grunberg-Nissan, Tamura-Kurata, Katti-Chaudhri, Heric-Brewer and of Hind et al. All the binary systems of the present study have negative excess molar volume over whole the temperature range which indicates strong interactions between the components of binary mixtures.