Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The densities, rho, speeds of sound, u and dynamic viscosities, eta of pure 1-ethyl-3- methylimidazolium trifluoromethanesulfonate, ([EMIM][CF3SO3]), dimethyl sulfoxide, (DMSO), acetonitrile, (ACN) and their binary and ternary mixtures have been measured experimentally over the entire composition range and at temperatures from (298.15, 303.15, 308.15, 313.15, 318.15 and 323.15) K and at pressure 0.1 MPa. The excess molar volume, VE, excess molar isentropic compressibility, K_s,m^E, viscosity deviations, Delta eta, Gibbs energy of activation, Delta G* and excess Gibbs energy of activation, Delta G*E have been calculated using the experimental rho, u and eta values of pure [EMIM][CF3SO3], DMSO, ACN and their binary/ternary mixtures at the studied temperatures and pressure. The excess/deviations properties for the studied binary/ternary systems have been fitted to Redlich-Kister equation. The variations of these parameters with composition and temperature are discussed in terms of ion-ion, ion-dipole and dipole-dipole interactions prevailing in these mixtures. The excess molar volumes of each binary system have also been correlated to the Prigogine-Flory-Patterson (PFP) theory. Some semi-empirical models for correlation / prediction of experimental dynamic viscosity data for studied binary and VE, K_s,m^E, Delta eta and Delta G*E for ternary mixtures have been applied.