Excess Volumes, Speeds of Sound, Isentropic Compressibilities, and Viscosities of Binary Mixtures of Acetophenone with Chlorotoluenes and Nitrotoluenes at 303.15 K (original) (raw)
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Bulletin of The Korean Chemical Society, 2012
Densities (), Viscosities () and ultrasonic speeds (u) of pure acetophenone (AP), propiophenone (PP), -methyl acetophenone (-MeAP), -chloroacetophenone (-ClAP) and those of their binary mixtures with -ethyl aniline (-EA) as a common component, were measured at 303.15 K over the entire composition range. These experimental data were used to calculate the excess volume , deviation in ultrasonic speeds , isentropic compressibility , intermolecular free length , acoustic impedance Z, deviations in isentropic compressibility , deviation in viscosity and excess Gibbs free energy of activation of viscous flow () at all mole fractions of -ethyl aniline. These parameters, especially excess functions, are found to be quite sensitive towards the intermolecular interactions between component molecules. Theoretical values of viscosity of the binary mixtures were calculated using different empirical relations and theories. The relative merits of these relations and theories were discussed. The ex...
Indian Journal of Chemical Technology, 2006
The densities and ultrasonic velocities of binary mixtures of 2,4,6-trimethyl-1,3,5-trioxane + ethanol, 1-propanol and 1-butanol at 298.15, 303.15 and 308.15 K were measured over the whole mole fraction range. Experimental data were used to estimate isentropic compressibility (κ s ), intermolecular free length (Lf), specific acoustic impedance (Z) and their deviations. such as deviation in isentropic compressibility (Δκ s ), excess intermolecular free length (L E f ) and excess acoustic impedance (Z E ). The results are fitted to a Redlich-Kister equation. The results are discussed in terms of molecular interactions.
Theoretical Investigation of Ultrasonic Studies and Molecular Interactions in Binary Liquid Mixtures
2013
The ultrasonic velocity can be measured using a single crystal variable path interferometer with 2MHZ by standard procedure. Using the ultrasonic velocity, various acoustical parameters such as adiabatic compressibility(βa), free length(Lf), acoustic impedance(Z), free volume(Vf), molar volume(V), internal pressure(∏i), relaxation time( ), Rao , s constant(R), Enthalpy(H), Wada , s constant(W), apparent molar volume(фv), apparent molar compressibility(фk) can be calculated. Using the experimental and computed data excess parameters such as excess adiabatic compressibility (β E ), excess acoustic impedance (Z E ), excess intermolecular free length (Lf E ), excess volume(Δv), excess viscosity(Δɳ), can be computed. The density and viscosity for the binary liquid mixtures can be measured by using the specific gravity bottle method and Ostwald viscometer respectively. This papers investigates the theoretical aspects for the ultrasonic and molecular interactions in binary liquids.
I. Introduction Recent development in science have found profound applications of liquid mixtures in the field of medicine, engineering, agriculture and other industrial applications, the study and understanding of thermodynamic and transport properties are more essential [1, 2]. Measurement of density and ultrasonic velocity has been adequately employed in understanding the molecular interactions in pure, binary, and higher order multi component liquid mixtures [3, 4]. The propagation of ultrasonic velocity in a medium is a thermodynamic property and has come to be recognized as a very specific and unique tool for predicting and estimating various physico-chemical properties of the liquid mixtures under consideration [5-7]. In recent years, there has been considerable interest in theoretical and experimental investigations of the excess thermodynamic properties of binary mixtures. In principle, the interaction between the molecules can be established from the study of the characteristic departure from ideal behaviour of some physical properties (i.e., volume, compressibility, and viscosity). The excess thermodynamic functions are sensitive to the intermolecular forces as well as to the size of the molecules. In order to study all these molecular-kinetic properties of liquids and liquid mixtures, low amplitude ultrasonic wave is very valuable. Ultrasonic methods have established a permanent place in science and new applications and found for the solution of many theoretical and practical problems. Most important features of ultrasonic systems are robustness, non-invasiveness, precision, low cost, rapidity and easy automation. Sometimes it become difficult to do thermo-acoustical study with actual liquid mixture system, in such cases mixtures of models compounds, often called surrogate mixtures, are useful for building an understanding of the physical properties and chemical reactions of complex fuel mixtures. Surrogate fuels can provide a baseline for engine performance, and they can help in making predictions for the more complex fuel [8-10]. A detail survey of literature shows that very less work has been done for (Nitrobenzene + Benzene) and (N, N-Dimethyl formamide + Benzene) mixtures. Keeping all these important applications of thermodynamic and acoustic study in our mind, we have studied the said property for (Nitrobenzene + Benzene) and (N, N-Dimethyl formamide + Benzene) mixtures over the entire composition range at four different temperatures T = (298, 308, 313 & 318.15) K and at one atmospheric pressure.
The Journal of Chemical Thermodynamics, 2018
Experimental measurements of densities and ultrasonic speeds for the binary mixtures of benzonitrile with methyl/ethyl/n-butyl methacrylates over the entire composition range were carried out in the temperature range 293.15 K-318.15 K and atmospheric pressure of 0.1 MPa. Using the experimental data, the excess molar volume, excess ultrasonic speed, excess isentropic compressibility, and excess molar isentropic compressibility have been calculated and correlated by Redlich-Kister equation. The partial molar and excess partial counterparts of molar volumes and molar compressibilities over the whole composition range; and at infinite dilution have also been calculated. The dependence of these parameters on composition and temperature has been interpreted in terms of intermolecular interactions prevailing in these mixtures. The order of interactions suggested by the excess functions is found to be MMA > EMA > BMA. The major cause of the order is the steric hindrance caused by alkyl group. The results showed the effect of varying chain length on excess functions and interactions of the system.
Journal of Chemical & Engineering Data, 1995
The speed of sound u, density Q, and viscosity 7 of nine binary mixtures of ethanenitrile, propanenitrile, and adiponitrile with dimethylformamide, dimethylacetamide, and dimethyl sulfoxide have been measured at 303.15 K. The isentropic compressibility Ks, excess volume VE, and excess isentropic compressibility % have been calculated from the results. The values of VE and % are examined as a function of composition, size, and polarity of the participating molecules.
Journal of Solution Chemistry, 2007
Densities (q), viscosities (g), and speeds of sound (u) of the ternary mixture (1-heptanol + trichloroethylene + methylcyclohexane) and the involved binary mixtures (1-heptanol + trichloroethylene), (1-heptanol + methylcyclohexane), and (trichloroethylene + methylcyclohexane) at 298.15 K were measured over the whole composition range. The data obtained are used to calculate excess molar volumes (V E), excess isobaric thermal expansivity (a E), viscosity deviations (Dg), excess Gibbs free energies of activation of viscous flow (DG * E), and excess isentropic compressibilities ðj E S Þ of the binary and ternary mixtures. The data of the binary systems were fitted to the Redlich-Kister equation while the best correlation method for the ternary system was found using the Nagata equation. Viscosities, speeds of sound and isentropic compressibilities of the binary and ternary mixtures have been correlated by means of several empirical and semi-empirical equations. The best correlation method for viscosities of binary systems is found using the Iulan et al. equation and for the ternary system using the McAllister equation. The best correlation method for speeds of sound and isentropic compressibilities of the binary systems is found using the IMR and for the ternary system using the IMR and JR.