Adiabatic compressibility, intermolecular free length and surface tension of power transformer oils at different temperatures through ultrasonic method

2020 ◽  
Vol 14 (5) ◽  
Keyword(s):  
Surface Tension ◽  
Power Transformer ◽  
Ultrasonic Method ◽  
Adiabatic Compressibility ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Different Temperatures ◽  
Transformer Oils

scholarly journals Excess Transport Properties of Binary Mixtures of Quinoline with Xylenes at Different Temperatures

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Sk. Fakruddin ◽  
Ch. Srinivasu ◽  
B. R. Venkateswara Rao ◽  
K. Narendra
Keyword(s):  
Ultrasonic Velocity ◽  
Acoustic Impedance ◽  
Adiabatic Compressibility ◽  
Polynomial Equation ◽  
Liquid Mixtures ◽  
Excess Functions ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Excess Parameters ◽  
Different Temperatures

The ultrasonic velocity and density of binary liquid mixtures of quinoline with o-xylene, m-xylene, and p-xylene have been measured over the entire range of composition at = 303.15, 308.15, 313.15, and 318.15 K. Using these data, various parameters like adiabatic compressibility (β), intermolecular free length (), and acoustic impedance () and some excess parameters like excess adiabatic compressibility (), excess intermolecular free length (), excess acoustic impedance (), and excess ultrasonic velocity () have been calculated for all the three mixtures. The calculated deviations and excess functions have been fitted to Redlich-Kister polynomial equation. The observed deviations have been explained on the basis of the intermolecular interactions present in these mixtures.

Molecular Interactions Investigation of L-Histidine in Water and in Aqueous Citric Acid at Different Temperatures Using Volumetric and Acoustic Methods

2018 ◽  
Vol 232 (3) ◽  
pp. 393-408 ◽  
Author(s):  
Dinesh Kumar ◽  
Shashi Kant Sharma
Keyword(s):  
Citric Acid ◽  
Molar Volume ◽  
Atmospheric Pressure ◽  
Apparent Molar Volume ◽  
Adiabatic Compressibility ◽  
Acid Solutions ◽  
Solvent Interactions ◽  
Intermolecular Free Length ◽  
Acoustic Methods ◽  
Different Temperatures

AbstractDensities,ρand ultrasonic speeds, u of L-histidine (0.02–0.12 mol·kg−1) in water and 0.1 mol·kg−1aqueous citric acid solutions were measured over the temperature range (298.15–313.15) K with interval of 5 K at atmospheric pressure. From these experimental data apparent molar volume ΦV, limiting apparent molar volume ΦVOand the slopeSV, partial molar expansibilities ΦEO, Hepler’s constant, adiabatic compressibilityβ, transfer volume ΦV, trO, intermolecular free length (Lf), specific acoustic impedance (Z) and molar compressibility (W) were calculated. The results are interpreted in terms of solute–solute and solute–solvent interactions in these systems. It has also been observed that L-histidine act as structure maker in water and aqueous citric acid.

scholarly journals Acustical Studies of Interactions in the Binary Mixtures of Ethylmethyl Ketone (EMK) and N,N-Dimethylformamide (DMF) through Ultrasonic Measurements at Different Temperatures

2015 ◽  
Vol 47 ◽  
pp. 120-132
Author(s):  
Baljeet Singh Patial
Keyword(s):  
Relaxation Time ◽  
Internal Pressure ◽  
Acoustic Impedance ◽  
Adiabatic Compressibility ◽  
Ultrasonic Velocities ◽  
Intermolecular Free Length ◽  
Acoustical Parameter ◽  
Wada’S Constant ◽  
Ultrasonic Measurements ◽  
Different Temperatures

Ultrasonic velocities (u), densities (ρ) and viscosities (η) are measured in respect of ethylmethylketone (EMK) and N,N-dimethylformamide (DMF) over the entire composition at 298, 308and 318K. Attempt have been made to extract the information with respect to various kind of intermolecular interactions, such as H-bonding, dipole-dipole, solute –solvent, dispersion type interactions existing between these two components from the following acoustical parameter when examined as a function of solvent composition at different temperatures: adiabatic compressibility (β), specific acoustic impedance (Z), intermolecular free length (Lf), molar sound velocity (Rm), wada’s constant (W), viscous relaxation time (τ), free volume and internal pressure (πi).

scholarly journals Thermoacoustic Parameters Determination of Intermolecular Free-Length of 1-Butyl-2,3-dimethylimidazolium Chloride in Mixed Solvents at T = (298.15 to 313.15) K

2019 ◽  
Vol 31 (12) ◽  
pp. 2719-2724
Author(s):  
Sailaja Muchipali ◽  
Ranjan Kumar Pradhan ◽  
Priyaranjan Mohapatra ◽  
Braja B. Nanda
Keyword(s):  
Comparative Study ◽  
Ultrasonic Method ◽  
Pure Water ◽  
Mixed Solvents ◽  
Ammonium Bromide ◽  
Free Length ◽  
Intermolecular Free Length

The intermolecular free-length of 1-butyl-2,3-dimethylimidazolium chloride [bdmim]Cl in pure water as well as in tetra-n-butyl ammonium bromide (TBAB) + water at different concentrations of solute and at T = (298.15 to 313.15) K have been evaluated by making use of ultrasonic and thermoacoustical parameters followed by a comparative study. To accomplish this objective, thermoacoustical parameters for the above said solutions have been calculated. These parameters have been used to determine intermolecular free-length (Lf) for the solutions under study. The values of Lf obtained by thermoacoustical approach were tallied with the values obtained by well-known ultrasonic method (Schaaffs method). To the best of our understanding, this study is an innovative attempt in the determination of inter-molecular free-length present in the investigated solutions by making use of ultrasonic approach.

scholarly journals Thermodynamic and Acoustic Study on Molecular Interactions in Certain Binary Liquid Systems Involving Ethyl Benzoate

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
B. Nagarjun ◽  
A. V. Sarma ◽  
G. V. Rama Rao ◽  
C. Rambabu
Keyword(s):  
Molar Volume ◽  
Molecular Interactions ◽  
Binary Data ◽  
Adiabatic Compressibility ◽  
Ethyl Benzoate ◽  
Strong Interactions ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Dimethyl Acetamide ◽  
Liquid Systems

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 (βad), intermolecular free length (Lf), and molar volume (V) 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 (LfE) 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 VE values are attributed to strong dipole-dipole interactions between unlike molecules in the mixtures. The binary data of Δβad, VE, and LfE were correlated as a function of molefraction by using the Redlich-Kister equation.

Thermo Acoustical Characterization of Several Inorganic Salts in Polyvinyl Pyrrolidone at 303.15 K, 308.15 K, 313.15 K

2017 ◽  
Vol 231 (9) ◽  
Author(s):  
K. Rathina ◽  
H.B. Ramalingam ◽  
R. Mahalakshmi ◽  
M. Umadevi
Keyword(s):  
Surface Tension ◽  
Zinc Sulphate ◽  
Liquid Mixture ◽  
Adiabatic Compressibility ◽  
Polyvinyl Pyrrolidone ◽  
Nonlinearity Parameter ◽  
Solvent Interactions ◽  
Intermolecular Free Length ◽  
Modified Surface

AbstractThe ultrasonic velocity, density and viscosity values of liquid mixture of aqueous polyvinyl pyrrolidone with aqueous zinc sulphate, manganese sulphate, zinc chloride and manganese chloride have been studied at 303.15 K, 308.15 K and 313.15 K. Relative association, surface tension, modified surface tension, adiabatic compressibility, acoustic impedance, intermolecular free length relaxation time and the nonlinearity parameter have been determined for various compositions. The variation observed in the results suggest that the presence of strong polymer-solvent interactions.

scholarly journals Acoustical Investigation of N–(2-hydroxybenzylidene)-3-Substituted Pyridine -2- Amine Schiff bases by Ultrasonic Velocity Measurements in Dioxane at Different Temperatures

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Mrunal M. Mahajan ◽  
Pravin B. Raghuwanshi
Keyword(s):  
Schiff Bases ◽  
Ultrasonic Velocity ◽  
Adiabatic Compressibility ◽  
Water Molecules ◽  
Water Medium ◽  
Velocity Measurements ◽  
Acoustic Parameters ◽  
Intermolecular Free Length ◽  
Different Temperatures ◽  
Solvent Molecules

<div><p><em>The present work deals with the study of acoustic parameters like ultrasonic velocity (V), </em><em>adiabatic compressibility (β<sub>s</sub>), apparent molar volume (</em><em>f</em><em><sub>v</sub></em><em>) and intermolecular free length (L<sub>f</sub>) by ultrasonic </em><em>interferometric measurements</em><em> which reflects structural interaction of water molecules and organic solvent molecules with substituted Schiff bases. The study of N–(2-hydroxybenzylidene)-3-substituted pyridine -2- amine Schiff bases were carried in different percentage of 1,4-dioxane-water medium, at 293, 297 and 300 K. The densities and velocities thus obtained were used to evaluate acoustic parameters for all the ligands.</em></p></div>

scholarly journals Ultrasonic Studies on the Nature of Molecular Interaction of Synthesized Mannich Bases in DMSO at Different Temperatures

2019 ◽  
Vol 31 (4) ◽  
pp. 960-964
Author(s):  
S. Farook Basha ◽  
M. Syed Ali Padusha
Keyword(s):  
Free Energy ◽  
Relaxation Time ◽  
Absorption Coefficient ◽  
Adiabatic Compressibility ◽  
Mannich Bases ◽  
Jones Potential ◽  
Intermolecular Free Length ◽  
Different Temperatures ◽  
Methyl Hydrazine ◽  
Available Volume

This work deals with the ultrasonic studies of the Mannich bases (morpholin-4-yl)(pyridin-3- yl)methyl]hydrazine carboxamide (MPH) and (morpholino)(thiophen-2-yl)methyl)nicotine hydrazide (MTN) by the measurements of parameters such as ultrasonic velocity (U), density (ρ), viscosity (η), adiabatic compressibility (κ), intermolecular free length (Lf), molar volume (Vm), relaxation time (τ), specific acoustic impedance (Z), lenard jones potential (LJP), internal pressure (πi), free volume (Vf) and molecular cohesive energy (MCE), available volume (Va), Gibbs free energy (ΔG) and absorption coefficient (α/f2). These results are inferred that the strong interaction exists between the solvent (DMSO) and solute (MPH and MTN).

scholarly journals Study on Thermodynamic Properties of Binary Mixtures of Diethyl Carbonate with Benzonitrile, Benzaldehyde at Different Temperatures

2014 ◽  
Vol 38 ◽  
pp. 1-7 ◽  
Author(s):  
B. Sudhamsa ◽  
M. Sarath Babu ◽  
K. Narendra
Keyword(s):  
Thermodynamic Properties ◽  
Speed Of Sound ◽  
Composition Range ◽  
Liquid Mixture ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Diethyl Carbonate ◽  
Binary Liquid ◽  
Intermolecular Free Length ◽  
Different Temperatures

The speed of sound and density in binary liquid mixture of diethyl carbonate + benzonitrile, + benzaldehyde have been determined at temperatures 298.15, 308.15 and 318.15 K over the whole composition range. The data have been utilized to estimate the excess adiabatic compressibility (βE), excess intermolecular free length (LfE), excess speed of sound (uE) at the above temperatures. The excess values have been found to be useful in estimating the strength of the interactions in the liquid mixtures.

scholarly journals Study of Acoustic Nature of Tetrapentylammonium Bromide in N,N-Dimethyl-Ethylmethyl Ketone Systems at Different Temperatures

2015 ◽  
Vol 48 ◽  
pp. 103-113
Author(s):  
Baljeet Singh Patial
Keyword(s):  
Relaxation Time ◽  
Internal Pressure ◽  
Ultrasonic Velocity ◽  
Acoustic Impedance ◽  
Adiabatic Compressibility ◽  
Solvent Mixtures ◽  
Density Data ◽  
Solvent Interactions ◽  
Intermolecular Free Length ◽  
Different Temperatures

Ultrasonic velocity, viscosity and density studies on solution of tetrapentylammonium bromide (Pen4NBr) in N,N-dimethylformamide, ethylmethylketone (EMK) and DMF-EMK solvent mixtures containing 0, 20, 40, 60, 80 and 100 mol % of DMF at 298, 308 and 318K have been reported. From the velocity, viscosity and density data values, various parameters namely, the adiabatic compressibility (β), Intermolecular free length (Lf), specific acoustic impedance (Z), free volume (Vf), internal pressure (πi) and relaxation time (τ) have been calculated. All these parameters have been discussed separately to throw light on the solute-solvent and solvent-solvent interactions.

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