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Advisor(s)
Abstract(s)
Refractive indices, n(D), and densities, rho, at 298.15 K were measured for the ternary mixture methanol (MeOH)/propan-1-ol (1-PrOH)/acetonitrile (MeCN) for a total of 22 mole fractions, along with 18 mole fractions of each of the corresponding binary mixtures, methanol/propan-1-ol, propan-1-ol/acetonitrile and methanol/acetonitrile. The variation of excess refractive indices and excess molar volumes with composition was modeled by the Redlich-Kister polynomial function in the case of binary mixtures and by the Cibulka equation for the ternary mixture. A thermodynamic approach to excess refractive indices, recently proposed by other authors, was applied for the first time to ternary liquid mixtures. Structural effects were identified and interpreted both in the binary and ternary systems. A complex relationship between excess refractive indices and excess molar volumes was identified, revealing all four possible sign combinations between these two properties. Structuring of the mixtures was also discussed on the basis of partial molar volumes of the binary and ternary mixtures.
Description
Keywords
Ternary Mixture Methanol Acetonitrile Propan-1-ol Refractive Index Density Molar Volume Excess Properties Excess Molar Volumes Acetonitrile Plus Methanol Binary-Liquids Mixtures 298.15 K 25-Degrees-C Systems Viscosities Ethanol Water N,N-Dimethylformamide
Citation
LEITÃO, R. E., [et al] – Densities and refractive indices for the ternary mixture methanol/propan-1-Ol/acetonitrile. Journal of Molecular Liquids. ISSN: 0167-7322. Vol. 170 (2012), pp. 30-36
Publisher
Elsevier Science BV