scholarly journals Ultrasonic Speed and Related Acoustical Parameters of 1,1ʼ-Binaphthalene-2,2ʼ-diyl Diacetate Solutions at 308.15 K

2011 ◽  
Vol 8 (2) ◽  
pp. 762-766
Author(s):  
Pooja P. Adroja ◽  
S. P. Gami ◽  
J. P. Patel ◽  
P. H. Parsania
Keyword(s):  
Adiabatic Compressibility ◽  
Linear Increase ◽  
Solvation Number ◽  
Ultrasonic Speed ◽  
Excellent Correlation ◽  
Acoustical Parameters ◽  
Free Energy Of Activation ◽  
Solvent Systems ◽  
Alcohol Ethyl ◽  
Nonlinear Increase

The density (ρ), viscosity (η) and ultrasonic speed (U) (2 MHz) of chloroform, THF, ethyl alcohol, ethyl acetate, 1,4-dioxane and 1,1ʼ-binaphthalene-2,2ʼ-diyl diacetate (DBNA) solutions have been determined at 308.15 K. Various acoustical parameters namely specific acoustical impedance (Z), adiabatic compressibility (κa), Van der Waals constant (b), intermolecular path length (Lf), internal pressure (π), Raoʼs molar sound function (R), relaxation time (τ), classical absorption coefficient (α/f2)cland solvation number (Sn) have been derived from ρ, η and U data and correlated with concentration (C). A fairly good to excellent correlation has been observed between a particular parameter and C. Linear increase of Z, R, b, (α/f2)cland τ (except EA) (R2= 0.90 – 0.999) and linear decrease of κs, π and Lf(R2= 0.947 – 0.995) with C supported existence of powerful molecular interactions in the solutions and further supported by nonlinear increase of Snwith C. A fairly constant Gibbs free energy of activation has been observed in all the solvent systems studied.

scholarly journals Ultrasonic Speed, Density, Viscosity and Associated Acoustical Parameters of Chloroform Solutions of Symmetric Double Schiff Bases at 308.15K

2015 ◽  
Vol 45 ◽  
pp. 16-23
Author(s):  
B.J. Gangani ◽  
Parsotam H. Parsania
Keyword(s):  
Relaxation Time ◽  
Schiff Bases ◽  
Molecular Interactions ◽  
Path Length ◽  
Adiabatic Compressibility ◽  
Free Path Length ◽  
Solvation Number ◽  
Ultrasonic Speed ◽  
Acoustical Parameters ◽  
Nonlinear Trends

The density, viscosity and ultrasonic speed (2MHz) of chloroform and symmetric double Schiff bases have been investigated at 308.15K. Various acoustical parameters such as specific acoustical impedance (Z), adiabatic compressibility (Кa), Rao’s molarsound function (Rm), Vander Waals constant (b), internal pressure (π), free volume (Vf), intermolecular free path length (Lf), classical absorption coefficient (α/f2)Cl) and viscous relaxation time (τ) were determined using ultrasonic speed (U), viscosity (η) and density (ρ) data of Schiff bases solutions and correlated with concentration. Increasing linear or nonlinear trends of (Z, Rm, b, τ and (α/f2)Cl) and decreasing trend of Кa, Lf,, π and Vf with increasing concentration of Schiff bases suggested presence of strong molecular interactions in the solutions and solvophilic nature of the Schiff bases, which is further supported by the positive values of solvation number. The nature and position of substituent also affected the strength of molecular interactions.

scholarly journals Thermo-Acoustical Study of Biologically Active 1,1’-Bis(3-Methyl-4-Carboxyethylphenoxy) Cyclohexane at Four Different Temperatures

2015 ◽  
Vol 47 ◽  
pp. 1-14 ◽  
Author(s):  
Bhavin. B. Dhaduk ◽  
Parsotam H. Parsania
Keyword(s):  
Molecular Interactions ◽  
Adiabatic Compressibility ◽  
Free Path Length ◽  
Linear Increase ◽  
Biologically Active ◽  
Acoustical Parameters ◽  
Free Energy Of Activation ◽  
Different Temperatures ◽  
Entropy Of Activation ◽  
Acoustical Study

Density (ρ), viscosity (η), ultrasonic speed (U), and thermo-acoustical parameters such as specific acoustical impedance (Z), adiabatic compressibility (κa), internal pressure (π), free volume (Vf), inter molecular free path length (Lf), Van der Waals constant (b), viscous relaxation time (τ), classical absorption coefficient (α/f2)cl, Rao’s molar sound function (Rm), solvation number (Sn), Gibbs free energy of activation (ΔG*), enthalpy of activation (ΔH*) and entropy of activation (ΔS*) of biologically active 1,1’-bis (3-methyl-4-carboxyethylphenoxy) cyclohexane (BMCPC) in 1,4-dioxane (DO), ethyl acetate (EA), tetrahydrofuran (THF) have been studied at four different temperatures: 298, 303, 308 and 313 K to understand the molecular interactions in the solutions. A good to excellent correlation between a given parameter and concentration is observed at all temperatures and solvent systems studied. Linear increase or decrease [except (α/f2)cl ] of acoustical parameters with concentration and temperature indicated the existence of strong molecular interactions. ΔG* decreased linearly with increasing concentration and temperature in DO and EA systems and increased with temperature in THF system. ΔH* and ΔS* are found practically concentration independent in case of DO and EA system but both are found concentration dependent in THF system.

scholarly journals Ultrasonic Investigation of Binary Solutions of Petrolium And Its Products

2021 ◽  
pp. 23-28
Author(s):  
Deepak A. Zatale ◽  
Sameer M. Bagade ◽  
Ajay R. Chaware
Keyword(s):  
Excess Volume ◽  
Adiabatic Compressibility ◽  
Excess Functions ◽  
Solvation Number ◽  
Ultrasonic Speed ◽  
Binary Solutions ◽  
Free Energy Of Activation ◽  
Different Temperatures ◽  
Apparent Molar Compressibility ◽  
Ultrasonic Investigation

<p>Experiment values of densities and ultrasonic speed of petroleum product Gasoline (Petrol) and 2T Oil were taken in different volume concentrations from 5%, 10%------, and 95% at different temperatures from 298.15K to 318.15K having difference of 5K. From the experimental data, Apparent Molar Compressibility (<em>ϕ<sub>K</sub></em>), Relative Association (<em>R<sub>A</sub></em>), Solvation Number (<em>S<sub>n</sub></em>), Free Energy of Activation (<em>ΔE</em>), Excess Adiabatic Compressibility (<em>β<sub>ad</sub><sup>E</sup></em>), Excess Volume (<em>V<sup>E</sup></em>), Excess Free Length (<em>L<sub>f</sub><sup>E</sup></em>) have been computed. These parameters are used to focus light on the nature of component molecules of binary liquids and the excess functions are found to be sensitive to the nature and extent of the intermolecular interactions taking place in these binary mixtures.</p>

Ultrasonic Study of Substituted Thiazoles at Different Temperatures

2015 ◽  
Vol 61 ◽  
pp. 105-109 ◽  
Author(s):  
A.B. Naik
Keyword(s):  
Ultrasonic Velocity ◽  
Adiabatic Compressibility ◽  
Effect Of Temperature ◽  
Water Mixture ◽  
Excellent Correlation ◽  
Acoustical Parameters ◽  
Temperature Variations ◽  
Solvent Interaction ◽  
Pure Solvent ◽  
Different Temperatures

Density, ultrasonic velocity of pure solvent, dimethylformamide (DMF) and ligand solutions of substituted thiazoles in DMF-water mixture were measured at different temperatures (303.15, 308.15, 313.15 and 318.15) K. Acoustical parameters such as adiabatic compressibility, intermolecular free length, acoustical impedance and relative association were determined from experimental data of density and ultrasonic velocity. The effect of temperature variations on the strength of molecular interaction has also been studied. An excellent correlation represents in terms of solute-solvent and solvent-solvent interaction at all temperatures.

scholarly journals Density, Viscosity and Ultrasonic Speed Based Acoustical Studies of Structural Properties of 1,1’-Bis(4-Amino Phenyl) Cyclohexane Symmetric Double Schiff Bases in THF Solutions at 303.15, 308.15 and 313.15K

2015 ◽  
Vol 53 ◽  
pp. 19-30
Author(s):  
Bhavesh J. Gangani ◽  
Parsotam H. Parsania
Keyword(s):  
Schiff Bases ◽  
Molecular Interactions ◽  
Path Length ◽  
Free Path Length ◽  
Isentropic Compressibility ◽  
Linear Increase ◽  
Ultrasonic Speed ◽  
Solvent Concentration ◽  
Acoustical Parameters ◽  
Different Temperatures

The density (ρ), viscosity (η) and ultrasonic speed (U) (2MHz) of THF solutions of symmetric double Schiff bases (SDSB-1,SDSB-2 and SDSB-3) were determined at 303.15, 308.15 and 313.15 K. Various acoustical parameters such as specific acoustical impedance (Z), isentropic compressibility (ks), Rao’s molar sound function (Rm), Van der Waals constant (b), internal pressure (π), free volume (Vf), intermolecular free path length (Lf), viscous relaxation time (τ) and classical absorption coefficient (α/f2)Cl), were determined using ρ, η and U data. The results are interpreted in terms of molecular interactions occurring in the solutions at different temperatures and concentrations. Linear increase of ρ, η U, Z, Rm, b, (α/f2)Cl and τ with increasing C, linear decrease of КS, Lf and π with increasing T, Vf increased linearly with C and T except SDSB-3 supported existence of strong molecular interactions in the solutions and confirming solvophilic nature of the Schiff bases. The structure, nature and size of the solutes and solvent, concentration and temperature affected molecular interactions.

scholarly journals Ultrasonic study of molecular interactions in binary mixtures of methyl methacrylate(MMA) with toluene and dimethylacetamide at 318 K

2016 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
R.G. Indhumathi
Keyword(s):  
Methyl Methacrylate ◽  
Binary Systems ◽  
Adiabatic Compressibility ◽  
Acoustical Parameters ◽  
Binary Solutions ◽  
Intermolecular Free Length ◽  
Wada’S Constant ◽  
Ultrasonic Measurements ◽  
Rao’S Constant ◽  
First Time

<p>The ultrasonic velocity, density and viscosity at 318K have been measured in the binary systems of Methyl methacrylate + Toluene and Methyl methacrylate + Dimethylacetamide. In this work an attempt has been made for the first time to investigate the behavior of binary solutions of Methylmethacrylate(MMA) in Toluene and Dimethylacetamide(DMAC) with regard to acoustical parameters such as adiabatic compressibility(β), intermolecular free length(l<sub>f</sub>), free volume(V<sub>f</sub>), Rao’s constant(R), Wada’s constant(W) and specific acoustical impedance(Z) from ultrasonic measurements at 318 K were calculated. The results are interpreted in terms of molecular interaction between the components of mixtures.</p>

scholarly journals Ultrasonic Study of Molecular Interactions in Binary Mixtures at 303 K

2010 ◽  
Vol 7 (2) ◽  
pp. 353-356 ◽  
Author(s):  
S. Mullainathan ◽  
S. Nithiyanantham
Keyword(s):  
Experimental Data ◽  
Internal Pressure ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Binary Systems ◽  
Adiabatic Compressibility ◽  
Acoustical Parameters ◽  
Intermolecular Free Length ◽  
Wada’S Constant ◽  
Rao’S Constant

The ultrasonic velocity, density and viscosity at 303 K have been measured in the binary systems of 1,4-dioxane and acetone with water. From the experimental data, various acoustical parameters such as adiabatic compressibility (β), intermolecular free length (Lf), free volume (Vf), internal pressure (πi), Rao’s constant (R), Wada’s constant (W) and specific acoustical impedance (Z) were calculated. The results are interpreted in terms of molecular interaction between the components of the mixtures.

Analysis on the Characteristics of Pile Skin Friction under the Displacement Interactions between Pile and Soil around

2011 ◽  
Vol 94-96 ◽  
pp. 1858-1863
Author(s):  
Pei Yuan Lin ◽  
Lian Sheng Tang ◽  
Qing Feng Ding
Keyword(s):  
Skin Friction ◽  
Relative Displacement ◽  
Linear Increase ◽  
Distribution Law ◽  
Difference Function ◽  
Testing Data ◽  
Three Stages ◽  
Friction Pile ◽  
The Relationship ◽  
Nonlinear Increase

On the basis of analyzing the occurring mechanism of pile skin friction, pile-soil relative displacement difference function is introduced, and the differential equation which depicts the relationship between pile skin friction and depth is derived, then the calculating model of pile skin friction with depth is established under considering the displacement-interaction process. Field monitoring data are employed to verify the rationality and validity of the model proposed. Through the established model, influences, exerted by pile-soil relative displacement difference, on the pile skin friction distribution are discussed and divided into three stages: I. stage of linear increase; II. stage of nonlinear increase; III. stage of convergence. Filed testing data comparing and theoretical analysis results indicate that the method proposed can describe the transferring process as well as the distribution law of pile skin friction under taking the pile-soil interaction into account, the parameters related and needed can be easily obtained, and the model suggested in this paper is of value in pile theory and engineering.

scholarly journals Intermolecular Interaction of Aqueous Dextran with Urea

2019 ◽  
Vol 8 (11) ◽  
pp. 742-748
Keyword(s):  
Isentropic Compressibility ◽  
Structural Rearrangement ◽  
Urea Solution ◽  
Ultrasonic Speed ◽  
Acoustical Parameters ◽  
Intermolecular Free Length ◽  
Different Temperatures ◽  
Gibb’S Free Energy ◽  
Dextran Solution ◽  
Aqueous Dextran

In this paper, the authors have given information regarding intermolecular interactions of aqueous dextran solution in urea. The behavior of dextran in urea has been examined by the help of ultrasonic interferometer working at frequency 5MHz at different temperatures ranging from 303 K to 323 K in 5K interval. Ultrasonic speed, density, viscosity measurements have been used for the evaluation of thermodynamic parameters like Gibb’s free energy (ΔG) as well as acoustical parameters are acoustic impedance (Z), isentropic compressibility (β), intermolecular free length (Lf ) and relaxation time (τ), etc. The results have been used to throw light on the nature of the interaction among solute and solvent, interpreted in the light of structural rearrangement occurs in the aqueous dextran and urea solution.

scholarly journals Ultrasonic Study of Molecular Interactions and Compressibility Behaviour of Samarium Soaps in Benzene-DMSO Mixture

2021 ◽  
Vol 9 (9) ◽  
pp. 71-75
Author(s):  
Darshana Rodric
Keyword(s):  
Molecular Interactions ◽  
Adiabatic Compressibility ◽  
Critical Micellar Concentration ◽  
Solvation Number ◽  
Acoustic Parameters ◽  
Solvent Interaction ◽  
Increase With Increase ◽  
Ultrasonic Measurements ◽  
Number Increase ◽  
Apparent Molar Compressibility

Abstract: Ultrasonic measurements of samarium soaps (palmitate and myristate) have been carried out in a mixture of benzene and DMSO (70%-30% v/v) to determine the critical micellar concentration(CMC), soap-solvent interaction and various acoustic parameters. The results show that ultrasonic velocity, intermolecular free length, adiabatic compressibility, adiabatic molar volume and apparent molar compressibility decrease while specific acoustic impedance, relative association and solvation number increase with increase in soap concentration. The results of ultrasonic measurements have also been explained in terms of well-known equations. Keywords: Ultrasonic measurements, molecular interactions, samarium soaps, compressibility, critical micellar concentration(CMC).

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