Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 18, Issue 5, Pages 1694-1704Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2012.03.011
Keywords
Molar excess volume; Partial molar volume; Formamide; Alkanol; Graph theoretical approach
Funding
- University Grant Commission, New Delhi, India
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Molar excess volumes have been measured at 298.15 K for formamide + 1-propanol, 2-propanol, 1-butanol, 2-methyl-1-propanol or 2-methyl-2-propanol mixtures. For an equimolar mixture, molar excess volumes follow the sequence: 1-butanol > 1-propanol > 2-methyl-1-propanol > 2-methyl-2-propanol > 2-propanol. The excess molar volume (V-m(E)) values have been fitted to Redlich-Kister polynomial equation and other volumetric properties like apparent molar volume, partial molar volume, excess partial molar volume were calculated. The excess volume data have also been rationalized by graph-theoretical arguments. It has been observed that V-m(E) calculated by this approach agree well with the corresponding experimental values. This analysis has further yielded information about the state of aggregation of pure components that is consistent with the existing views on their nature of association. The infrared spectral studies lend further credence to the graph theoretical arguments. (C) 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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