Volumetric and viscometric study of molecular interactions in the mixtures of some secondary alcohols with equimolar mixture of ethanol and N, N-dimethylacetamide at 308.15 K

Densities and viscosities of mixtures of isopropanol, isobutanol and isoamylalcohol with equimolar mixture of ethanol and N, N-dimethylacetamide have been measured at 308.15 K over the entire composition range. Deviations in viscosity, excess molar volume and excess Gibb’s free energy of activation...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2011-02, Vol.406 (4), p.854-858
Main Authors: Sreekanth, K., Sravana Kumar, D., Kondaiah, M., Krishna Rao, D.
Format: Article
Language:English
Subjects:
Condensed matter
Condensed matter: structure, mechanical and thermal properties
Density
Deviation
Diffusive momentum transport (including viscosity of liquids)
Ethanol
Ethyl alcohol
Exact sciences and technology
Excess Gibb’s free energy
Excess molar volume
Liquids
Mathematical analysis
Molecular interactions
Physics
Redlich–Kister type polynomial
Transport properties of condensed matter (nonelectronic)
Viscosity
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Summary:Densities and viscosities of mixtures of isopropanol, isobutanol and isoamylalcohol with equimolar mixture of ethanol and N, N-dimethylacetamide have been measured at 308.15 K over the entire composition range. Deviations in viscosity, excess molar volume and excess Gibb’s free energy of activation of viscous flow have been calculated from the experimental values of densities and viscosities. Excess properties have been fitted to the Redlich–Kister type polynomial equation and the corresponding standard deviations have been calculated. The experimental data of viscosity have been used to test the applicability of empirical relations of Grunberg–Nissan, Hind–McLaughlin, Katti–Chaudhary and Heric–Brewer for the systems studied. Molecular interactions in the liquid mixtures have been investigated in the light of variation of deviation and of excess values in evaluated properties. ► Volumetric and viscometric studies of liquid mixtures are useful in pharmacy field. ► Molecular interactions in ethanol and N, N-dimethylacetamide with alcohols are studied. ► Weak interactions observed due to rupture of hydrogen bond between alcohol molecules. ► Measured viscosity values compared with theoretical values obtained by polynomials.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2010.12.013