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)
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.
2022
Densities, refractive indices and speeds of sound and their excess properties for 1-butyl-3methylimidazolium tetrafluoroborate [Bmim] [BF4] with 1-pentanol over the entire range of mole fraction are reported at temperatures ranging from 298.15 K to 313.15 K and atmospheric pressure. Isentropic and excess isentropic compressibility for ionic liquids with 1-alcohols were calculated from the experimental results. The excess values are fitted to the Redlich-Kister polynomial equation to estimate the binary coefficients and standard error between the experimental and calculated values. The measured speeds of sound were compared to the values obtained from Schaaffs' collision factor theory, Jacobson's intermolecular free length theory of solutions and Nomoto's relation. In addition, the experimentally obtained refractive indices were compared to the calculated values using Lorentz-Lorenz, Dale-Gladstone and Eykman mixing rules. The theoretical results obtained from these relations fairly agrees within the experimental precision. Further, the molecular interactions involved in IL binary mixture system were studied.
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).
International journal of advanced chemistry, 2022
Density (ρ), ultrasonic velocities (u) and refractive indices (n) of the binary mixture between cyclic ether with 1-propanol, 1-butanol, 1hexanol, 1-octanol for the entire concentration range have been measured at 303.15K, furthermore, deviation in refractive indies from ideal mixture, molar refraction, deviation in molar refraction from ideal values for these mixture has also been evaluated. The deviations from ideality of the acoustical parameters are explained on the basis of molecular interaction between the component molecules in these binary liquid mixtures. The molecular refraction (Rm), excess molecular refraction ( ) and excess molar volume (VE) were calculated from the experimental data. The results are discussed in term of molecular interactions between the components of the binary mixtures.
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.
The densities () and refractive indices (nD) of binary mixtures of acetonitrile with benzene, toluene, m-xylene and mesitylene including those of pure liquids, over the entire composition range expressed by mole fraction x1 of acetonitrile were measured at temperatures (298.15, 303.15, 308.15, and 313.15) K under atmospheric pressure. From the experimental data, the excess molar volumes ( E V m ) and the deviations in refractive indices (Δn) were calculated. These results are fit to a Redlich-Kister type polynomial equation. The results indicate the presence of weak interactions between acetonitrile and aromatic hydrocarbon molecules. The deviations in E V m values follow the order toluene < benzene < m-xylene < mesitylene. The results are discussed in terms of the intermolecular interactions.
Fluid Phase Equilibria, 2012
Density ( ), refractive index (n D ), and molar excess enthalpy (H E ) of binary mixtures of propan-1-ol with 2,2,4-trimethylpentane, butan-1-ol with 2,2,4-trimethylpentane and pentan-1-ol with 2,2,4trimethylpentane at 298.15 K and ambient pressure have been experimentally measured in the whole composition range. Excess molar volumes (V E ), deviation of refractive indices ( n D ), deviations of molar refraction ( R) and H E data were correlated with Redlich-Kister equation. Refractive indexes estimates were carried out using several mixing rules. An estimation of density of the binary mixture was performed using the equation suggested by Nakata and Sakurai [35] using the Lorentz-Lorenz refractive index mixing rule with densities and refractive indexes of the pure substances. Wilson and Non Random Two Liquids (NRTL) models were applied for H E correlation. The Prigogine-Flory-Patterson (PFP) and Extended Real Association Solution (ERAS) theories have been used to correlate the excess molar volumes of the mixtures. The behavior of the thermophysical properties was analyzed in terms of the length of the alkanol chain and the balance between positive and negative deviations of the ideality.
Fluid Phase Equilibria, 2007
Densities, viscosities, and ultrasonic velocities of binary mixtures of chloroform with propan-1-ol and butan-1-ol have been measured over the entire range of composition, at (303.15 and 313.15) K and at atmospheric pressure. From the experimental data, excess molar volumes (V E), deviations in viscosity (∆η), and excess isentropic compressibility (κ s E) have been calculated. The excess molar volumes and isentropic compressibility for propan-1-ol and butan-1-ol are positive while deviations in viscosity are negative. The results have been interpreted in terms of intermolecular interactions. These are further fitted to the Redlich-Kister polynomial equation.
Chemical Engineering Communications, 2018
Densities, ultrasonic speeds, refractive indices, excess and partial molar properties of binary mixtures of imidazolium based ionic liquid with pyrrolidin-2-one at temperatures from 298.15 L to 323.15 K,
Thermochimica Acta, 2009
The excess molar volumes, V E , and viscosity deviations, Á, were calculated from the measured density and viscosity data over the whole composition range for the ternary systems of 1,3-dioxolane (DO), dichloromethane (DM) + methyl acetate (MA), ethyl acetate (EA), propyl acetate (PA), butyl acetate (BA) and isoamyl acetate (IA) at 298.15 K. From the experimental observations the speed of sounds and refractive indices of these ternary mixtures have been measured over the entire range of composition at the same temperature. Also the isentropic compressibility, deviation in isentropic compressibility and deviation in molar refraction have been evaluated. The excess or deviation properties were found to be either negative or positive depending on the molecular interactions and the nature of liquid mixtures.
Asian Journal of Chemistry, 2019
Ultrasonic speeds (u) and refractive indices (n) of the binary liquid mixtures of ethanol with diisopropyl ether (DIPE) or cyclohexane or n-alkane (C6-C9) were experimentally measured from 298.15 to 318.15 K over entire composition range. Using these measurements deviation in ultrasonic speed (Δu), deviation in refractive index (Δn), excess intermolecular free length (Lf E ) and excess isentropic compressibility (Ks E ) were calculated and fitted with Redlich-Kister equation. The Δu values are negative for all binary mixture and magnitude of negative deviation for binary mixture of ethanol and n-alkane decreases as chain length increases. At equimolar composition, Ks E follows the order: n-hexane > n-heptane >n-otcane > n-nonane > diisopropyl ether > cyclohexane. Experimental results were analyzed to understand the various molecular interactions present in the binary mixtures. The u values for all binary liquid solutions were also correlated using different empirical ...
The Canadian Journal of Chemical Engineering, 2011
Densities and refractive indices of binary mixtures of isopropylethanoate with several symmetrical hydrocarbons viz cyclohexane, benzene, 1,4-dimethylbenzene and 1,3,5-trimethylbenzene at 308.15 K have been measured. The excess molar volumes (V E) are evaluated from the measured density values for the four binary systems. Experimental refractive indices are used to evaluate deviation in refractive indices (n) and molar refraction at experimental temperature. V E values are positive for the mixtures studied except binary mixtures between ester and 1,4-dimethylbenzene which have negative V E values. Standard deviations (V E) and (n) are also reported. Results are discussed in terms of molecular interactions between the components of the mixtures. Nous avons mesuré les densités et les indices de réfraction de mélanges binaires d'isopropyléthanoate avec plusieurs hydrocarbures symétriques, soit du cyclohexane, du benzène, du 1,4-diméthylbenzène et du 1,3,5-triméthylbenzèneà 308,15 K. Les volumes molaires excédentaires (V E) ont etéévaluésà partir des densités mesurées pour les quatre systèmes binaires. Les indices expérimentaux de réfraction ont serviàévaluer l'écart des indices de réfraction (n) ainsi que la réfraction molaireà la température expérimentale. Les valeurs des VEétaient positives pour les mélangeś etudiésà l'exception des mélanges binaires d'ester et de 1,4-diméthylbenzène qui présentaient des valeurs des VE négatives. Lesécarts type (V E) et (n) sontégalement indiqués. La discussion des résultats porte sur les interactions moléculaires entre les composants des mélanges.
Refractometric Studies on Molecular Interactions in Six Binary Liquid Mixtures
Open Journal of Physical Chemistry, 2014
Refractive indices of the six binary mixtures between N-Butyl bromide with Aniline, Benzene, Xylene, Carbon tetrachloride, n-Heptane and Toluene for the entire concentration range have been measured at 303.15 K. Furthermore, deviation in refractive indices from ideal mixture, molar refraction, deviation in molar refraction from ideal values for these mixtures has also been evaluated. The results are discussed in term of molecular interactions between the components of the binary mixtures.