Heat capacities of the mixtures of ionic liquids with acetonitrile

Isobaric specific heat capacities were measured for {1-hexyl-3-methylimidazolium tetrafluoroborate (HMIMBF 4) + acetonitrile (MeCN)} and {1-methyl-3-octylimidazolium tetrafluoroborate (OMIMBF 4) + acetonitrile} within the whole range of composition and temperatures from (283.15 to 323.15) K. The exc...

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Bibliographic Details
Published inThe Journal of chemical thermodynamics Vol. 42; no. 2; pp. 189 - 192
Main Authors Waliszewski, Dariusz, Piekarski, Henryk
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.02.2010
Elsevier
Subjects
Acetonitrile
Chemical thermodynamics
Chemistry
Exact sciences and technology
Excess molar heat capacity
General and physical chemistry
Heat capacity
Ionic liquids
Mixtures
Thermodynamic properties
Ionic liquids
Heat capacity
Excess molar heat capacity
Acetonitrile
Thermal properties
Binary mixture
Organic solvent
Excess parameter
Ionic liquid
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Summary:Isobaric specific heat capacities were measured for {1-hexyl-3-methylimidazolium tetrafluoroborate (HMIMBF 4) + acetonitrile (MeCN)} and {1-methyl-3-octylimidazolium tetrafluoroborate (OMIMBF 4) + acetonitrile} within the whole range of composition and temperatures from (283.15 to 323.15) K. The excess molar heat capacities were calculated from the experimental results and satisfactorily fitted to Redlich–Kister type polynomials for several selected temperatures. Negative deviations from the additivity of molar heat capacities were observed within the whole composition range of (HMIBMF 4 + MeCN) and (OMIMBF 4 + MeCN). The results obtained have been interpreted in terms of interactions between ionic liquids and acetonitrile.
ISSN:0021-9614
1096-3626
DOI:10.1016/j.jct.2009.08.002