期刊
JOURNAL OF CHEMICAL THERMODYNAMICS
卷 57, 期 -, 页码 238-247出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2012.08.030
关键词
Density; Refractive index; Speed of sound; Ionic liquids; Alcohols
资金
- Department of Science and Technology (SA)
- National Research Foundation (SA)
- Durban University of Technology
- CNPq (Brazil)
Experimental densities, speeds of sound, and refractive indices of the binary mixtures {1-butyl-3-methylimidazolium methylsulphate ([BMIM](+)[MeSO4](-)) + methanol, or 1-propanol, or 2-propanol, or 1-butanol} were measured over the whole range of composition at T = (298.15, 303.15, 308.15, and 313.15) K. From the experimental data, excess molar volumes, excess isentropic compressibilities, deviation in refractive indices and molar refractions were calculated. The excess molar volumes, change in isentropic compressibilities, and deviation in refractive indices were fitted by the Redlich-Kister smoothing polynomial. The Lorentz-Lorenz equation was applied to correlate the volumetric properties and predict the density or the refractive index of the binary mixtures. Results for these quantities have been discussed in terms of intermolecular interactions between the components of the mixtures. For all the systems studied, the excess molar volume and excess isentropic compressibility are negative, while the change in refractive index on mixing is always positive over the entire composition range and at all temperatures. (C) 2012 Elsevier Ltd. All rights reserved.
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