Changes of refractive indices for Ethanol + Water + (Ethyl Acetate or 1-Pentanol) at 298.15 K

Year 2017, , 174 - 181, 01.09.2017

Rebecca S. Andrade Cristina González Miguel Iglesias

https://doi.org/10.5541/eoguijt.310389

Cited By: 2

Abstract

Analysis of different thermodynamic properties as refractive index in
multicomponent systems provides valuable information about mixing
characteristics in complex media. In this work, the refractive index of the
ternary mixtures ethanol + water + (ethyl acetate or 1-pentanol) at 298.15 K
and atmospheric pressure, has been measured over the whole concentration range,
due to the importance of the latest compounds (ethyl acetate and 1-pentanol) as
main trace chemicals in distillated liquors. The obtained experimental values
indicate varying extent of interstitial accommodation among unlike molecules on
mixing, the steric hindrance of the alkyl chains of ethyl acetate or 1-pentanol
being the key factor. Because of the high accuracy technology for refractive
index measurements, numerous theoretical/empirical models have been developed
in the last few years. An adequate agreement between the measured and predicted
values was showed by the tested methods, despite the high non-ideal trend of
the studied ternary mixtures.

Keywords

Refractive index, complex mixture, prediction, density

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