Liquid Densities and Excess Molar Volumes for Binary Systems (Ionic Liquids?+?Methanol or Water) at 298.15, 303.15 and 313.15 K,and at Atmospheric Pressure |
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| Authors: | Pravena Bhujrajh Nirmala Deenadayalu |
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| Institution: | (1) Department of Chemistry, Durban University of Technology, Steve Biko Campus, P.O. Box 1334, Durban, 4000, KwaZulu-Natal, South Africa |
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| Abstract: | Binary excess molar volumes, V
m
E, have been evaluated from density measurements, using a vibrating tube densimeter over the entire composition range for binary
liquid mixtures of ionic liquids 1-ethyl-3-methyl-imidazolium diethyleneglycol monomethylethersulphate EMIM]+CH3(OCH2CH2)2OSO3]− or 1-butyl-3-methyl-imidazolium diethyleneglycol monomethylethersulphate BMIM]+CH3(OCH2CH2)2OSO3]− or 1-methyl-3-octyl-imidazolium diethyleneglycol monomethylethersulphate MOIM]+CH3(OCH2CH2)2OSO3]−+methanol and EMIM]+CH3(OCH2CH2)2OSO3]−+water at 298.15, 303.15 and 313.15 K. The V
m
E values were found to be negative for all systems studied. The V
m
E results are explained in terms of intermolecular interactions and packing effects. The experimental data were fitted by the
Redlich-Kister polynomial. |
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| Keywords: | Ionic liquids Methanol Excess molar volumes Redlich-Kister polynomial |
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