Volumetric, ultrasonic, viscometric and refractive index behavior of binary mixtures of 2,2,4-trimethylpentane with aromatic hydrocarbons: An experimental and theoretical study (original) (raw)
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Physics and Chemistry of Liquids, 2017
In the present investigation, density and speed of sound have been reported for binary liquid mixtures of tetrahydrofuran with benzyl alcohol and 4-methoxybenzyl alcohol over the entire composition range at T = 303.15, 308.15 and 313.15 K. From the experimental data, excess molar volume (V E m), excess isentropic compressibility (κ E s), excess molar isentropic compressibility (κ E s;m), and excess speed of sound (u E) of liquid mixtures have been calculated. The excess partial molar volume, V E m;1 , V E m;2 , excess partial molar isentropic compressibility, K E s;m;1 K E s;m;2 , over the whole composition range together with partial molar volume, V 0 m;1 , V 0 m;2 , partial molar isentropic compressibility K 0 s;m;1 , K 0 s;m;2 , excess partial molar volume, V 0E m;1 , V 0E m;2 , and excess partial molar isentropic compressibility, K 0E s;m;1 , K 0E s;m;2 at infinite dilution have also been calculated. All excess properties have been correlated using Redlich-Kister smoothing polynomial equation.
International Journal of Thermophysics, 2009
The densities, ρ, viscosities, η, ultrasonic speeds, u, and refractive indices, n D , of pure benzene, methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA), styrene (STY), and their binary liquid mixtures have been measured over the entire composition range at 298.15 K, 303.15 K, 308.15 K, and 313.15 K. The experimental data have been used to calculate excess molar volumes. Partial molar volumes of MA/EA/BA/STY in benzene at infinite dilution and at different temperatures have also been evaluated. The results were discussed in terms of molecular interactions prevailing in the mixtures. Keywords Alkyl acrylates • Benzene • Binary mixtures • Excess functions • Molecular interactions 1 Introduction This study is a continuation of our earlier studies [1-5] on molecular interactions of binary non-aqueous liquid mixtures using thermodynamic and transport properties. Here we extend our study to the binary mixtures containing commercially important monomers, methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA), and styrene (STY) with benzene. A knowledge of thermodynamic and transport properties of these industrially important solutions is often required for industrial applications
Density (ρ), refractive index (nD), and speed of sound (u) values are measured for the binary mixture of 1-butyl-3-methylimidazolium tetrafluoroborate (1) and N-vinyl- 2-pyrrolidinone (2) over the entire range of mole fractions at temperatures from T = (298.15 to 323.15) K under atmospheric pressure. Using the basic experimental data, various acoustic and thermodynamic parameters are calculated and are discussed in terms of molecular interactions between the present investigated binary system. The excess values are fitted to the Redlich−Kister polynomial equation to estimate the binary coefficients and standard deviation between the experimental and calculated values. Further, the molecular interactions in the binary mixture system are analyzed using the experimental FT-IR spectrum recorded at room temperature.
Journal of Solution Chemistry, 2010
Measurements of the ultrasonic velocity (u), density (ρ) and refractive index (n) for binary mixtures of polyethylene glycol 250 dimethyl ether with 1-propanol and 1-butanol have been made at three temperatures (T = 293, 303 and 31 K) over the entire composition range in order to investigate the nature of intermolecular interactions between the components of these liquid mixtures. Various excess thermodynamic properties such as the excess ultrasonic velocity ( u), deviation in isentropic compressibility ( k S ), excess intermolecular free length (L E f ), excess acoustic impedance (Z E ), excess pseudo-Grüneisen parameter (Γ E ), and molar refraction deviation ( R m ) were calculated using experimental values of the ultrasonic velocity, density and refractive index and were then represented with the Redlich-Kister polynomial equation. The observed excess deviation parameter values were explained on the basis of the strength of intermolecular interactions between the components of the mixtures. Estimations of the refractive index and ultrasonic velocity have also been made using various empirical relations and are discussed in terms of the average percentage deviations (APD).
The densities, ρ ultrasonic speeds, u and refractive index nD of the binary mixtures of ionic liquid 1-butyl-3- methylimidazolium hexafluorophosphate [BMIM][PF6] with 2-propoxyethanol, including those of pure liquids, have been measured over the entire range of composition at 298.15, 303.15, 308.15, 313.15, 318.15 and 323.15 K and atmospheric pressure. The IR spectra of these mixtures have also been recorded at 298.15 K. From the experimental data, excess molar volumes, Vm E , excess isentropic compressibility, κs E, deviations in ultrasonic speed, Δu, excess molar isentropic compressibility, Ks,m E , and deviations in refractive indices, ΔϕnDwere calculated and fitted using the Redlich–Kister equation. The partial molar volumes, Vm;1 and Vm;2, partial molar isentropic compressibilities, Ks;m;1 and Ks;m;2, excess partial molar volumes, VE m;1 and VE m;2 and excess partial molar isentropic compressibilities, KE s;m;1 and KE s;m;2 over whole composition range; partial molar volumes, V° m;1 and V° m;2, partial molar isentropic compressibilities, K s;m;1 and K° s;m;2, excess partial molar volumes, V°E m;1 and V°E m;2 and excess partial molar isentropic compressibilities, K E s;m;1 and K°E s;m;2 of the components at infinite dilution have also been calculated. The variations of these parameters with composition and temperature have been discussed in terms of intermolecular interactions prevailing in these mixtures.
This paper reportsmeasurements of densities (ρ), and speeds of sound (u) for the binary systems of an ionic liquid 22 and an alkanediol at T =(298.15 to 323.15) K. The ionic liquid is 1-butyl-3-methylimidazolium tetrafluoroborate 23 [bmim(BF4)] and alkanediols are 1,2-propanediol or 1,3-propanediol. The excess molar volumes and the excess 24 molar isentropic compressibility for the above systemswere calculated fromexperimental densities and the speeds 25 of sound, respectively. Redlich–Kister polynomial equationwas used to fit the excessmolar volume and excess isen- 26 tropic compressibility data. A qualitative analysis of intermolecular interactions and structural effects between 27 [bmim(BF4)] and alkanediols are analyzed in terms of declustering and breaking of H-bonds in alkanediols, new 28 hydrogen bonding, and ion–dipole interactions at all temperatures
Journal of Chemical & Engineering Data, 2009
Experimental physical properties (densities, speeds of sound, and refractive indices) and their derived and excess properties (excess molar volumes, isentropic compressibility, and excess molar isentropic compressibility) of binary systems containing cycloalkanes with aromatics (cyclopentane (1), or cyclohexane (1), or methylcyclohexane (1), or cyclooctane + o-xylene (2), + m-xylene (2), + p-xylene (2), or + mesitylene (2)) at T) (298.15 and 313.15) K and at atmospheric pressure were determined over the whole composition range. The excess properties of all the studied binary systems were satisfactorily fitted to the Redlich-Kister equation.
International Journal of Thermophysics, 2004
The densities, ρ, viscosities, η, and refractive indices, n, of binary mixtures of benzene with 1-butanol, 2-methyl-1-propanol, 2-butanol, and 2-methyl-2-propanol, including those of the pure liquids, were measured over the complete composition range at 30°C. The dependence of ρ, η, and n on composition was checked by using an empirical relation. The experimental data were used to calculate excess molar volumes, V E, deviations in viscosity, Δ η, excess free energies of activation of viscous flow, G *E, deviations in refractive index, Δn, apparent molar volumes, V ϕ,1 and V ϕ, 2, and partial molar volumes, , of benzene in alcohols and alcohols in benzene, respectively, at infinite dilution. The variations of these parameters with composition and the effect of branching in alcohols were discussed from the point of view of intermolecular interactions in these mixtures.