In this work, viscosities, densities, and speeds of sound of three binary mixtures containing the ionic liquids 1-ethyl-3methylimidazolium bis(trifluoromethylsulfonyl)imide, [emim][NTf 2 ], 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [bmim]-[NTf 2 ], and 1-hexyl-3-methylimidazo-lium bis(trifluoromethylsulfonyl)imide, [hmim][NTf 2 ], mixed with ethanol were measured at atmospheric pressure in the range of (278.15 to 338.15) K, covering the entire range of compositions. From these experimental data, the excess isentropic compressibility and molar isentropic compressibility of pure components and mixtures have been calculated. Additionally, excess properties, such as viscosity deviation, excess molar volume, excess isentropic compressibility, and excess molar isentropic compressibility, have been calculated and fitted with the Redlich−Kister polynomial equation.
The density, viscosity, and speed
of sound of three mixtures formed
by 1-propanol and an ionic liquid were measured in a temperature range
of 278.15–338.15 K. All measurements were made at atmospheric
pressure and covered the entire range of miscible compositions. The
three ionic liquids have the same anion but differ in the cation:
1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [emim][NTf2], 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide,
[bmim][NTf2], and 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide,
[hmim][NTf2]. The experimental data allowed calculate the
molar volume and isentropic compressibility of the mixture and their
respective excess properties. Values of these excess properties were
fitted to a Redlich–Kister type equation, and a set of parameters
was obtained for each property.
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