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Title: Volumetric, acoustic and refractive index for the binary system (Butyric acid + Hexanoic acid) at different temperatures
Authors: Bahadur, Indra 
Deenadayalu, Nirmala 
Naidoo, Paramespri 
Ramjugernath, Deresh 
Keywords: Density;Sound velocity;Refractive index;Carboxylic acids;Lorentz–Lorenz approximation;Mixing rules
Issue Date: 12-Apr-2014
Publisher: Springer
Source: Bahadur, I.; Deenadayalu, N.; Naidoo, P. and Ramjugernath, D. 2014. Volumetric, acoustic and refractive index for the binary system (Butyric acid + Hexanoic acid) at different temperatures. J Solution Chem (2014) 43:787–803. DOI 10.1007/s10953-014-0159-2
Journal: Journal of solution chemistry 
In this paper density, sound velocity, and refractive index for the binary system (butyric acid ? hexanoic acid) were measured over the entire composition range and at 5 K intervals in the temperature range 293.15–313.15 K. The excess molar volumes, isentropic compressibilities, excess isentropic compressibilities, deviation in refractive indices, molar refractions, and deviation in molar refractions were calculated by using the experimental densities, sound velocities, and refractive indices, respectively. The Redlich–Kister equation was used to fit the excess molar volume, excess isentropic compressibility, deviation in refractive index and deviation in molar refraction data. The Lorentz–Lorenz approximation was used to correlate the excess molar volume from the deviation in refractive index and also to predict the density from refractive index or the refractive index from density of the binary mixtures. Four sound velocity mixing rules were tested and the best model for the systems studied in this work was the Berryman mixing rule. The thermodynamic properties are discussed in terms of intermolecular interactions between the components of the mixtures.
ISSN: 0095-9782
Appears in Collections:Research Publications (Applied Sciences)

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