Change of refractive indices in ternary mixtures containing chlorobenzene + n-hexane + (n-heptane or n-octane) at 298.15 K

Abstract

The refractive indices of ternary mixtures of chlorobenzene + n-hexane (n-heptane or n-octane) have been measured at 298.15 K and at atmospheric pressure over the whole composition diagram. Parameters of polynomial equations which represent the composition dependence of physical and derived properties are gathered. The experimental refractive indices and the ternary derived properties are compared with the data obtained using several predictive semi-empirical models. The use of the Soave?Redlich?Kwong (SRK) and the Peng?Robinson (PR) cubic equations of state with the Van der Waals one-fluid mixing rule, which incorporate different combining rules to predict refractive indices on mixing, are tested against the measured results, good agrement being obtained.

Changes of refractive indices of the ternary mixtures chlorobenzene +n-hexane + (n-nonane orn-decane) at 298.15 K

“…As polar interactions diminish, the refractive index becomes lower. The experimental results agree with this explanation since all the studied mixtures show excess volumes that are negative in accordance with previously published data [11]. This fact shows that the packing caused by geometrical effects is higher than the change of intermolecular forces.…”

“…The purpose of this work is to continue our labor on the field of thermochemical properties for a better understanding of mixing trend of chemicals related to contamination with chlorobencene and hydrocarbons [9][10][11][12]. In this way, the first step is the thermodynamic characterization of the mixtures (physical properties, vapor-liquid equilibria, liquid-liquid equilibria, etc.)…”

Ultrasonic velocity measurements for the ternary mixtures chlorobenzene +n-hexane + linear aliphatic alkane (C7–C8) at 298.15 K

“…1, the changes of isentropic compressibilities at each ternary mixture are showed as a function of solvent molar fraction, where the influence of the methylene group contribution difference can be observed. In what is referred to n-alkanes, the functional variation decreases the negative change of isentropic compressibility from n-hexane to n-nonane, progressively, as observed in our studies [18] and recent ternary experiments in our laboratory [10,24,25]. As it is observed in Figs.…”

Deviations in Refractive Index Parameters and Applicability of Mixing Rules in Binary Mixtures of Benzene + 1,2-Dichloroethane at Different Temperatures

“…Belda et al (2005) studied the synergy of aqueous ethanol solutions using refractive index measurements. Tourino et al (2004) derived the deviations in refractive index of ternary mixtures and analyzed a number of mixing rules and equation of state (EOS) parameters for the mixtures studied. Refractive index mixing rules were also tested by Aminabhavi (1984) and Giner et al (2005).…”