Thermodynamic Properties of Binary Mixtures of Methyl Benzoate with Chlorobenzene and Benzaldehyde at 308.15 and 318.15K (original) (raw)
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PSYCHOLOGY AND EDUCATION, 2020
Ultrasonic velocity, density and kinematic viscosity for the binary mixtures of benzyl benzoate with 2-methoxyethanol, 2ethoxyethanol and 2-butoxyethanol measured experimentally over the entire composition range at constant temperatures 303.15, 313.15 and 323.15 K. Using this data calculated excess thermo dynamic parameters such as excess molar volume, excess free length, excess Gibbs activation energy, deviation in isentropic compressibility and deviation in kinematic viscosity. In the light of excess/deviation parameters estimated the molecular interaction between above binary mixtures. Excess molar volume, excess free length, deviation in isentropic compressibility and deviation in kinematic viscosity are fitted to Redlich-Kister polynomial equation of fourth order. An attempt is made to express the molecular interaction based on Partial molar volumes. In this study correlate the viscosities of binary liquid mixture of benzyl benzoate with 2-alkaxyethanols using equations Grunberg-Nissan (GN), Katti-Chowdary (KC), Tamura-Kurata (TK), Hind et al.(Hind), Auslander (Aus) and Jouyban-Acree (JA). The ultrasonic study reveals that the strength of molecular interactions at all the temperature follows the order BB+BE>BB+EE> BB+ME.
Journal of Solution Chemistry, 2009
Densities and ultrasonic speeds of binary mixtures of benzaldehyde with n-hexane and cyclohexane at 30 °C were measured over the entire composition range. From these experimental data, the adiabatic compressibility (K S ), intermolecular free length (L f), acoustic impedance (Z), relative association (R a) and relaxation strength (r) were calculated. Also, the excess adiabatic compressibility (K S E ), intermolecular free length (L f E ), acoustic impedance (Z E), and ultrasonic velocity (U E) were calculated. The observed variation of these parameters helps in understanding the nature of interactions in these mixtures. Further, theoretical values of the ultrasonic speed were evaluated using theories and empirical relations. The relative merits of these theories and relations were discussed.
Int J Thermophys (2013) 34:1280–1287, 2013
The values of the density, viscosity, and speed of sound for binary liquid mixtures of benzaldehyde with chlorobenzene or nitrobenzene have been measured over the entire range of composition at (303.15, 308.15, and 313.15) K. These values have been used to calculate the excess molar volume (VE), and excess free volume (. McAllister’s three-body interaction model is used for correlating the kinematic viscosity of binary mixtures. The thermophysical properties (density, viscosity, and ultrasonic velocity) under study were fit to the Jouyban–Acree model.
2012
"The values of density, viscosity, and ultrasonic velocity for the binary liquid mixture of benzaldehyde with bromobenzene have been measured over the entire range of composition at 303.15, 308.15, and 313.15 K. These values have been used to calculate the excess molar volume (VE), deviation in viscosity (Dg), deviation in velocity (DU), deviation in isentropic compressibility (Dbs), excess internal pressure (Dp), excess intermolecular free length (DLf), and excess acoustic impedance (DZ). McAllister’s three-body-interaction model is used for correlating kinematic viscosity of binary mixtures. The excess values were correlated using the Redlich–Kister polynomial equation to obtain their coefficients and standard deviations. The thermo-physical properties (density, viscosity, and ultrasonic velocity) under the study were fitted to the Jouyban– Acree model."
Journal of Thermodynamics, 2013
Speeds of sound and density for binary mixtures of ethyl benzoate (EB) with N,N-dimethylformamide (NNDMF), N,N-dimethyl acetamide (NNDMAc), and N,N-dimethylaniline (NNDMA) were measured as a function of mole fraction at temperatures 303.15, 308.15 K, 313.15 K, and 318.15 K and atmospheric pressure. From the experimental data, adiabatic compressibility (ad), intermolecular free length (), and molar volume () have been computed. The excess values of the above parameters were also evaluated and discussed in light of molecular interactions. Deviation in adiabatic compressibilities and excess intermolecular free length () are found to be negative over the molefraction of ethyl benzoate indicating the presence of strong interactions between the molecules. The negative excess molar volume values are attributed to strong dipole-dipole interactions between unlike molecules in the mixtures. The binary data of Δ ad , , and were correlated as a function of molefraction by using the Redlich-Kister equation.
Thermodynamic Study of Binary Liquid Mixtures of Benzene and 1,2- dichloroethane at T = 303.15 K
International Journal of Thermodynamics, 2013
Thermodynamic studies like density (ρ), specific gravity, ultrasonic speed (u) and excess molar volume () and excess enthalpy () of binary liquid mixtures of benzene + 1,2-dichloroethane have been carried out over the different range of composition at 303.15 K. Thermodynamic parameters like isentropic compressibility (k s) intermolecular free length (L f) and relative association (R A) have been calculated from density and ultrasonic speed measurement. The excess thermodynamic functions have been fitted to the Redlich-Kister polynomial equation. The experimental ultrasonic speeds have been analyzed in terms of Jacobson Free Length Theory (FLT), Schaaff's Collision Factor Theory (CFT), Nomoto's relation, and Van Dael's ideal mixture relation. Intermolecular Free Length (L f) and available volume (V a) have been calculated from FLT, CFT and thermoacoustic approach. It is observed that density and specific gravity increases and ultrasonic speed, isentropic compressibility and intermolecular free length decreases with the mole fraction of 1,2-dichloroethane. It is found that intermolecular interaction present between binary liquid mixtures were stronger than pure solvent-solvent interactions. Observed negative values of excess molar volume and positive value of molar excess enthalpy confirm the presence of specific chemical attractive force of interactions between the two binary liquid mixtures.
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.
ULTRASONIC AND THERMODYNAMIC STUDIES IN ORGANIC BINARY LIQUID MIXTURE
The ultrasonic velocity (u), density (ρ), and viscosity (η) have been measured for the binary mixtures of Butanol +N,N Dimethyl acetamide m, Pentanol + N, N Dimethyl acetamide,and Hexanol + N, N Dimethyl acetamide at 30 0 C. The experimental data have been used to calculate the acoustical parameters namely adiabatic compressibility (β), intermolecular free length (Li), acoustical impedance (Z) ultrasonic absorption ([α/f 2 ]), the excess values of some of the above parameters have also been evaluated. The results obtained here are used to explain the molecular interaction between the components of the binary mixture. Thermodynamic properties are useful for understanding the variations in liquid structure and the molecular interaction of the liquid mixtures. Ultrasonic investigation finds extensive applications in probing in to the physico-chemical behavior and properties of the liquid and binary liquid mixture. Investigation results are used in design processes in the chemical and petrochemical industries. The measurement of ultrasonic velocity in liquids and liquid mixtures is used as an effective tool to prove the properties of liquid mixtures. Pure liquids and liquid mixtures consisting polar & non-polar components are considerable importance in analyzing intermolecular interaction between component molecules and molecular structure accurately. The ultrasonic investigations of these studies find several applications in the field of research in science, technology and industries. The excess values of acoustical parameters of binary liquid mixture are useful in understanding the solute-solvent interactions. Ultrasonic studies provide a wealth of information about the state of liquid.
Russian Journal of Physical Chemistry- A, 2012
Ultrasonic velocity (u), density (ρ) and viscosity (η) measurements of benzaldehyde + ethylbenzene mixtures have been carried out at 303.15, 308.15 and 313.15 K. These values have been used to calculatethe excess molar volume (VE), deviation in viscosity (Δη), and deviation in isentropic compressibility (Δβs),deviations in ultrasonic velocity (Δu), excess free volume (ΔVf), excess intermolecular free length (ΔLf) and excess gibbs free energy of activation of viscous flow (ΔGE). McAllister’s three body interaction model is used for correlating kinematic viscosity of binary mixtures. The excess values were correlated using the Redlich– Kister polynomial equation to obtain their coefficients and standard deviations. The thermophysical properties under the study were fit to the Jouyban–Acree model. The observed variation of these parameters helps in understanding the nature of interactions in these mixtures. Further, theoretical values of the ultrasonic speed were evaluated using theories and empirical relations.