Thermophysical investigations and prediction of calorimetric potentials in binary mixture of 1-butyl-3-methylimidazolium trifluoromethanesulfonate with 1-pentanol.

Autor: SrinivasaReddy, M., Srinivasa Rao, G., Md Nayeem, SK., Raju, K. T. S. S., Hari Babu, B.
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Zdroj: Journal of Thermal Analysis & Calorimetry; Apr2018, Vol. 132 Issue 1, p725-739, 15p
Abstrakt: Physical properties, such as density (ρ) and speed of sound (u) of [Bmim][triflate], 1-pentanol and their binary mixtures, are measured over the whole composition range as a function of temperature between 298.15 and 328.15 K at atmospheric pressure. Experimental values are used to calculate the excess molar volumes (VmE), excess values of partial molar volumes (V¯mE), partial molar volumes at infinite dilution (V¯mE,∞), excess values of isentropic compressibility (κsE), free length (LfE), speeds of sound (uE) and isobaric thermal expansion coefficient (αPE) for the binary mixture. These excess properties are fitted to the Redlich-Kister-type equation to obtain the binary coefficients and the standard deviations. A qualitative analysis of these parameters indicates strong intermolecular interactions in both the systems and the interaction increases with the increase in temperature. An attempt has been made to predict derivatives of thermodynamic potentials through physicochemical parameters, and using empirical relations excess chemical potentials/molecular properties of the mixtures from nonlinear parameter are also computed at 308.15 K. The presence of strong interactions was further supported by IR spectroscopy. In addition, analysis of VmE data of the mixture was done through the Prigogine-Flory-Patterson theory. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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