Browsing by Author "Mohite, Sudhir"

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    Interaction studies in binary liquid mixtures of methyl formate with o-, m- and p-xylenes using viscosity data at 303.15K
    (2012-01) Rathnam, M.V.; Mohite, Sudhir; Kumar, MSS
    Densities, viscosities, refractive indices of binary liquid mixtures composed of methyl formate and o-, m- and p-xylenes were determined at 303.15K and atmospheric pressure for he whole range of composition. From the experimental results the deviation in viscosity (), excess Gibbs free energy of activation of flow (DG*E), and the deviation in molar refraction (R) were deduced. The deviation in viscosities were correlated with Redlich-Kister polynomial equation. The values are negative while the values of DG*E are positive and the R values are both positive and negative over the entire range of composition for all the studied systems. The ability of different one parameter and two parameter empirical models to predict mixing viscosities was also studied.
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    Viscosity, Density, and Refractive Index of Some (Ester + Hydrocarbon) Binary Mixtures at 303.15 K and 313.15 K
    (2011-12) Rathnam, M. V.; Mohite, Sudhir
    The viscosity, density, and refractive index of binary mixtures of ethyl formate or ethyl formate or ethyl benzoate with o-xylene, m-xylene, p-xylene, and ethylbenzene were determined at 303.15 K and 313.15 K and atmospheric pressure for the whole composition range. From the experimental measurements, the deviations in viscosity, Dh, were correlated accurately with the Redlich - Kister polynomial equation. The deviations in molar refraction, DR, were calculated from the Lorentz- Lorentz equation. The experimental viscosities were fitted to an empirical equation proposed by Frenkel. It was observed that the equation predicts the mixture viscosities reasonably well at both temperatures and the agreement between the experimental and calculated values is satisfactory.