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Plots of deviation in ultrasonic velocity (Δu) against mole fraction, x1 of DMSO for the binary mixtures of DMSO+AP (♦), DMSO+CH (■) and DMSO+3P (▴)
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Ultrasonic velocities, u, densities, ρ, of binary liquid mixtures of dimethyl sulphoxide (DMSO) with ketones such as acetophenone (AP), cyclohexanone (CH), and 3-pentanone (3P), including pure liquids, over the entire composition range have been measured at 308.15 K. Using the experimental data, deviation in ultrasonic velocity, Δu, deviation in is...
Citations
... The densities were measured using a 15-cm 3 double-arm bi-capillary Pycnometer (12) . Pycnometer was dipped in a transparent glass-walled water bath with a thermal stability of ±0.01 K using a thermostat for maintaining the constant temperature. ...
... The ultrasonic technique is an NDT (Non-Destructive Technique) [5] that cannot cause any damage or disorder to the structure and does not change the sample. It is the most convenient method to investigate the thermodynamic properties in binary and ternary solutions mainly found in food [6], cosmetics, material testing, underwater ranging, cleaning, leather, and [7,8] pharmaceutical industries. Ultrasonic and thermodynamics studies were done to analyze the mixture's nature and power of intermolecular interactions [9]. ...
The density and speed of sound for an aqueous solution containing Vitamin B7 (biotin) at variant temperatures from (288.15K to 318.15K) and (0.000 to 0.003) mol. kg-1 concentration has been measured with Anton Paar DSA 5000 M at constant pressure 0.1 MPa. The observed data were used to derive various thermo-acoustic parameters. Acoustic impedance, adiabatic compressibility, Vander Waal's constant, Rao's constant, Wada's constant, and intermolecular free length were determined by the obtained speed of sound and density values. In addition, the ternary mixture of biotin and glycols (Propylene glycol and hexylene glycol) shows the intermolecular (solute-solvent) interactions inside the liquid solution.
... It is due to the prevailing existence of interactions among molecules that are not identical. The occurrence of β ad and L f E minima at the same concentrations confirms the occurrence of molecular interactions [21]. DMM is a substance that is polar and linked to it. ...
The intermolecular hydrogen bond interactions in the dimethyl malonate with some branched alkanols (2-methyl-1-propanol, 2-propanol, and 2-butanol) binary mixture have been studied experimentally and theoretically. The ultrasonic velocities U, densities ρ of binary mixtures of dimethyl malonate with 2-methyl-1-propanol, 2-propanol, 2-butanol from 303.15 K to 318.15 K were measured. Excess molar volume (VE), deviation in adiabatic compressibility (Δβad) and excess intermolecular free length ( LEf) have been calculated from the measured experimental data. It is observed that the order of interactions in dimethyl malonate – branched alkanols mixtures is 2-methyl-1-propanol > 2-propanol > 2-butanol.
... Ultrasonic waves emitted by solids, polymers, suspensions, cleansers, and fluid mixtures are presently a widely used for analyzing various materials' physical characteristics and molecular linkages. The reflection of acoustical characteristics and related physicochemical characteristics plays an important role in interpreting the numerous forces that act on molecules [5][6][7][8]. Acoustic studies of liquid mixes are used to determine the thermodynamic properties of compressed liquids, which are important components in various industries such as pharmaceuticals, chemicals, leather, cosmetics, etc. [9][10][11][12]. ...
Using the Anton-Paar DSA 5000 M, the density and sound speed of polyethylene glycols (polyethylene glycol 400; polyethylene glycol 4000) in an entire range of concentrations (0.07, 0.08, and 0.09) mol.kg-1 aqueous solutions of vitamin B3 (niacin) were measured at constant experimental pressure 0.1 MPa and temperature ranges (288.15 K, 298.15 K, 308.15 K, and 318.15 K). These experimental results were used to measure acoustic and thermodynamic parameters such as acoustic impedance, adiabatic compressibility, intermolecular free length, Wada's constant, Rao's constant, and Vander Waal's constant, which provided insight into the intermolecular interactions within the ternary mixture of niacin and polyethylene glycols (PEG 400and 4000).
... The investigations of molecular association in blends of different polarity are particularly attractive due to their wide applica-tions in various fields. Many studies [11][12][13] were published to study the interaction of 1-alkanols with other liquids using the ultrasonic velocity findings. Though exhaustive amounts of investigations were carried out in liquid mixtures having polar liquid as one of the component [14,15], interactions of benzene with higher alcohols are scarcely reported. ...
First point of view of this report is briefly comments about the potential of azeotrope development in the blends of 1-alkanols (1-pentanol/1-hexanol/1-heptanol) with benzene. The relative volatility (r) calculation of all binary blends was used to prove this possibility of the azeotrope formation. Second point of view of this report is also concerned with the same idea but achieved by ultrasonic study using different parameters such as ultrasonic velocity (U), density (ρ), and viscosity (η), and few thermo–acoustical variables like adiabatic compressibility (β), free length (Lf), free volume (Vf), and internal pressure (πi), and their excess (AE) magnitudes. In this regard, the important standard magnitudes of the individual components and their mixtures are experimental measured. The origin of the existence of the suggested intermolecular interaction is found to be useful in predicting the possible azeotrope formation and in determining the exact mole fraction of such formations. The excess parameters are fitted to polynomial type Redlich-Kister equation and coefficients of the fitting are found to support the present investigations.
... The binary complexes taken up for the present study is aniline + m-xylene both are symmetric, aniline is strong polar but m-xylene is weak polar. It will be interesting to study the influence of an asymmetric alcohol molecule in a symmetric molecular environment [9][10][11]. Though the alcohol molecule is in a symmetric molecular environment the environment is not fully symmetric. ...
... The binary complexes taken up for the present study is aniline + m-xylene both are symmetric, aniline is strong polar but m-xylene is weak polar. It will be interesting to study the influence of an asymmetric alcohol molecule in a symmetric molecular environment [9][10][11]. Though the alcohol molecule is in a symmetric molecular environment the environment is not fully symmetric. ...
The values of sound velocity, density and viscosity have been measured at 303 K in the ternary systems of aniline + m-xylene + n, sec, tert and iso-butanols. From these data, acoustical parameters such as molar volume, adiabatic compressibility, free length, free volume and internal pressure have been estimated using the standard relations. The results are interpreted in terms of molecular interaction between the components of the mixtures. The presence of weak dipole-induced dipole interactions of larger magnitude is confirmed in the ternary systems. Of all the isomeric butanols, 1-ol, and especially 2-ol are found to be good structure makers that make the ternary complexes. In addition the possible interactions between the components are further confirmed by their excess values.
... This indicates the presence of strong interactions between the liquids in study like formation of H-bonding and fitting of smaller into voids created by the bigger molecules[39]. Generally, imidazolium ionic liquids are polar solvents under favorable conditions that can form hydrogen bond as these act as donors and acceptors of protons[61]. Hence, we can assume that the hydrogen bonds between the ionic liquid [Emim][EtSO 4 ] and 2-ethoxyethanol are responsible to make a remarkable contraction in the volume of the mixture. ...
... According to Rajagopal and Chenthilnath [60], the strength of interaction between the participating molecules also depends on the dipole moment of the interacting molecules. It is evident that BB and the EA are polar and their dipole moment values follow μ BB = 2.06 D N μ EA = 1.38 D. In the present study, the possibility of Keesom dipole-dipole van der Waals forces which arise due to the dipole moment of the components gives strong interactions leading to negative values of V m E [61]. Further, as the difference between dipole moment values of the binary system increases, the strength of interaction decreases [61]. ...
... It is evident that BB and the EA are polar and their dipole moment values follow μ BB = 2.06 D N μ EA = 1.38 D. In the present study, the possibility of Keesom dipole-dipole van der Waals forces which arise due to the dipole moment of the components gives strong interactions leading to negative values of V m E [61]. Further, as the difference between dipole moment values of the binary system increases, the strength of interaction decreases [61]. In the present study, negative V m E values suggest the possibility of dipole-dipole interactions between BB and EA molecules. ...
... This indicates the presence of strong interactions between the liquids due to formation of Hbonding and fitting of smaller molecules into voids created by the bigger molecules[29]. Generally, imidazolium ionic liquids are polar solvents and under favorable conditions can form hydrogen bond as these act as donors and acceptors of protons[56]. Hence, we can assume that the hydrogen bonds between the ionic liquid [Emim][EtSO 4 ] and 2-methoxyethanol are responsible for the remarkable contraction in the volume of the mixture. ...
The density (ρ), speed of sound (u) and refractive index (n
D) for pure [Emim][EtSO4], 2-methoxyethanol and their binary mixtures were measured using an Anton Paar vibrating tube density and sound velocity meter (DSA 5000 M) and automatic refractometer over the whole composition range as a function of temperature between 298.15 and 328.15 K in steps of 10 K at atmospheric pressure. Experimental values were used to calculate the excess values of molar volumes (\( V_{\text{m}}^{\text{E}} \)), partial molar volumes (\( \overline{V}_{\text{m}}^{\text{E}} \)), partial molar volumes at infinite dilution (\( \overline{V}_{\text{m}}^{{{\text{E,}}\infty }} \)), isentropic compressibility (\( \kappa_{S}^{\text{E}} \)), acoustic impedance (Z
E), free length (\( L_{\text{f}}^{\text{E}} \)), speeds of sound (\( u_{{}}^{\text{E}} \)), internal pressure (\( \mathop \pi \nolimits_{i}^{\text{E}} \)), free volume (\( V_{\text{f}}^{\text{E}} \)) and deviations in refractive index (
\( \Delta_{\phi } n_{\text{D}} \)) for the binary mixtures. These properties were fitted to a Redlich–Kister type equation to obtain the binary coefficients and the standard deviations. The negative values of \( V_{\text{m}}^{\text{E}} \), \( \kappa_{S}^{\text{E}} \), \( L_{\text{f}}^{\text{E}} \),\( \alpha_{p}^{\text{E}} \), and \( V_{\text{f}}^{\text{E}} \) and positive values for Z
E, \( u_{{}}^{\text{E}} \),\( \mathop \pi \nolimits_{i}^{\text{E}} \), and \( \Delta_{\phi } n_{\text{D}} \) indicate the existence of strong interactions between the components. This was further supported by IR spectroscopy analysis.
