The
densities, ρ, speeds of sound, u, and
dynamic viscosities, η, 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 of 298.15, 303.15, 308.15, 313.15,
318.15, and 323.15 K and at a pressure of 0.1 MPa. The excess molar
volume, V
E, excess molar isentropic compressibility, K
s,m
E, viscosity deviations, Δη, Gibbs energy of activation, ΔG*, and excess Gibbs energy of activation, ΔG
*E have been calculated using the experimental
ρ, u, and η 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
semiempirical models for correlation/prediction of experimental dynamic
viscosity data for studied binary and V
E, K
s,m
E, Δη, and ΔG
*E for ternary mixtures
have been applied.