Refractive index of binary and ternary mixtures containing propyl propanoate, heptane and octane at various temperatures (original) (raw)
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Refractive indices, densities and excess properties of binary mixtures ot ethanol, wtih hexane, hepatano, octane, and wáter have been determined experimentally over the entire range of composition at (293.15, 298.15, 303.15 and 308.15) . The excess molar volumen and changes of refractive índices on mising data were fitted to the fourth order Redlich Kister equation for the determination of the adjustable parameters.
Bistua: Revista de la Facultad de Ciencias Básicas, 2010
Refractive indices and densities of binary mixtures of ethanol + hexane, heptane, octane and water have been determined experimentally over the entire range of composition at (293.15, 298.15, 303.15, 308.15) K and at atmospheric pressure. The excess molar volume and changes of refractive indices D n on mixing data were fitted to the fourth order Redlich-Kister equation for the determination of the adjustable parameters. The corresponding excess molar volume and changes of Refractive indices values have been evaluated from the experimental data and fitted to a temperature dependent equation. The sign and magnitude of the calculated excess quantities have been discussed in terms of the nature of the solvent-solvent interactions in binary 2 mixtures.
Study of the refractive index of gasoline+alcohol pseudo-binary mixtures
Ovidius University Annals of Chemistry
The properties of gasoline change as a result of blending with a bioalcohol, affecting the behavior of the pseudo-binary system. The aim of this paper is to present experimental data of the refractive index for pseudobinary mixtures of a reformate gasoline with ethanol, isopropanol and n-butanol over the entire composition range and for temperature ranging from 293.15 K to 313.15 K. The accuracy of different equations to predict the refractive index of the mixtures was tested. The best prediction accuracy (the lower AAD) corresponded to Eykman and Lorentz-Lorenz mixing rules. A logarithmic equation proposed to correlate the refractive index with composition and temperature of gasoline+alcohol mixtures showed a good accuracy (the absolute average deviation AAD < 0.052%). The deviations in refractive index for investigated systems are negative over the entire composition range and at all investigated temperatures.
Study of the refractive index of gasoline+alcohol pseudo-binary mixtures Seria Chimie
2017
The properties of gasoline change as a result of blending with a bioalcohol, affecting the behavior of the pseudo-binary system. The aim of this paper is to present experimental data of the refractive index for pseudobinary mixtures of a reformate gasoline with ethanol, isopropanol and n-butanol over the entire composition range and for temperature ranging from 293.15 K to 313.15 K. The accuracy of different equations to predict the refractive index of the mixtures was tested. The best prediction accuracy (the lower AAD) corresponded to Eykman and Lorentz-Lorenz mixing rules. A logarithmic equation proposed to correlate the refractive index with composition and temperature of gasoline+alcohol mixtures showed a good accuracy (the absolute average deviation AAD < 0.052%). The deviations in refractive index for investigated systems are negative over the entire composition range and at all investigated temperatures.
Temperature coefficients of the refractive index for hydrocarbons and binary mixtures
Chemical Physics Letters, 2012
Temperature coefficients of the refractive index (dn/dT) for nine hydrocarbons and two sets of binary mixtures were investigated in this work. The measured Àdn/dT values for the pure hydrocarbons were found to be inversely proportional to their molar volumes (V m ) and molecular weights (M). Experimental data for binary mixtures show that Àdn/dT varies linearly with volume and mass fractions, consistent with theory derived from the linear relationships of Àdn/dT with 1/V m and 1/M for individual hydrocarbons. This study should aid the interpretation of the observed correlations of dn/dT with physical and combustion properties of diesel fuels.
Theoretical Evaluation of Refractive Index in Binary Liquid Mixtures
E-Journal of Chemistry, 2005
The density and refractive index (RI) for four binary liquid mixtures: diethyl malonate + dimethylformamide (DEM+DMF), diethyl malonate + Hexane (DEM+HEX), diethyl malonate + tetrahydrofuran (DEM+THF), diethyl malonate + 1,4-dioxane (DEM+DO) have been measured. The experimental values are compared with those calculated from Lorentz-Lorentz, Heller, Newton and Gladstone -Dale mixing rules.
Physics and Chemistry of Liquids, 2013
The measures of the refractive indices of the ternary mixtures chlorobenzene + n-hexane +(n-nonane or n-decane) have been done at 298.15K and atmospheric pressure in the whole composition diagram. The composition dependence of the derived magnitude has been compared with the data obtained with several theoretical models. Attending to the accurate results of these models, the equation of state enclosing mixing rules are pointed out as simple procedures for a multicomponent estimation of refractive indices, the corresponding binary parameters could be used to other thermophysical studies