Viscosity of binary mixtures. II. n-butyl,n-hexyl,n-octyl,n-decyl,and n-dodecylamine with benzene and n-hexyl,n-decyl,and n-dodecylamine with cyclohexane |
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Authors: | S L Oswal A T Patel |
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Affiliation: | (1) Department of Chemistry, South Gujarat University, 395007 Surat, India |
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Abstract: | Viscosities of eight binary systems of n-butylamine, n-hexylamine, n-octylamine, n-decylamine, and n-dodecylamine with benzene and n-hexylamine, n-decylamine, and n-dodecylamine with cyclohexane have been measured at 303.15 K with an Ubbelohde suspended level viscometer. Based on Eyring's theory, values of excess Gibbs energy of activation G
*E of viscous flow have been calculated. Deviations of viscosities from linear dependence on the mole fraction and values of G
*E are attributed to H-bonding and to the size of alkylamine molecules. The free volume theory of Prigogine-Flory-Patterson in combination with the work of Bloomfield-Dewan has been used to estimate the excess viscosity In and the terms corresponding to enthalpy, entropy, and free volume contributions for 10 binary mixtures containing n-butyl, n-hexyl, n-octyl, n-decyl, and n-dodecylamine with benzene and cyclohexane. |
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Keywords: | activation energy alkylamines benzene binary liquids butylamine cyclohexane decylamine dodecylamine Eyring's theory hexylamine octylamine Prigogine-Flory-Patterson-Bloomfield-Dewan theory viscosity |
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