Densities and viscosities of binary liquid mixtures of formamide with 2-methoxyethanol, acetophenone, acetonitrile,
1,2-dimethoxyethane, and dimethylsulfoxide have been measured at (298.15, 308.15, and 318.15) K and over the
entire composition range at p = 0.1 MPa. Ultrasonic speeds of these binary liquid mixtures have also been measured
at 298.15 K and the same pressure. From the experimental data, values of excess molar volume
, viscosity
deviation Δη, and deviation in isentropic compressibility ΔK
S have been determined. These results were fitted to
the Redlich−Kister-type polynomial equation. The density and viscosity data have been analyzed in terms of
some semiempirical viscosity models.
The densities and viscosities of some thiocyanate compounds, viz., ammonium thiocyanate, sodium thiocyanate, and potassium thiocyanate, in 10 %, 20 %, and 30 % by mass of 1,3-dioxolane + water mixtures have been determined at T = (298.15, 308.15, and 318.15) K and p = 0.1 MPa. The speeds of sound of the thiocyanate compounds in 10 %, 20 %, and 30 % by mass of 1,3-dioxolane + water mixtures have also been determined at 298.15 K. Apparent molar volumes (V
ϕ), viscosity B-coefficients, and adiabatic compressibility (β) of these electrolytes were obtained from their densities, viscosities, and speed of sound data. The limiting apparent molar volumes (V
ϕ
o) and experimental slopes (S
v*) derived from the Masson equation and the obtained parameters have been interpreted in terms of ion−solvent and ion−ion interactions, respectively. The viscosity data were evaluated by using the Jones−Dole equation. The structure making/breaking capacities of the electrolytes have been inferred from the sign of (δ2ϕV
o/δT
2)
p
and dB/dT. The activation parameters of viscous flow for the ternary solutions studied were also calculated and explained by the application of transition state theory.
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