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).

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 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>

scholarly journals Investigation on Molecular Interactions of Multicharged Electrolytes Potassium Pyrophosphate and Potassium Dichromate in Aqueous D-Sorbitol Media at 298.15K by Densiometric and Acoustic Methods

2020 ◽  
Vol 11 (1) ◽  
pp. 8075-8086
Keyword(s):  
Alkali Metal ◽  
Internal Pressure ◽  
Molecular Interactions ◽  
Acoustic Impedance ◽  
Potassium Dichromate ◽  
Alkali Metal Ions ◽  
Solvation Number ◽  
Solvent Interaction ◽  
Acoustic Methods ◽  
Structure Breaking

Two multicharged electrolytes, potassium pyrophosphate, and potassium dichromate have been taken for densiometric and acoustic studies at 298.15K. Solvents for these electrolytes are 5, 10, and 15 weight % of D-sorbitol in water. From the density d and ultrasonic velocity U compressibility values, K_s,K_(s,ф),〖 K〗_T and W for the solutions, as well as for the solvents, are derived. Other acoustic variables like molar free volume V_f, internal pressure π_i, relative association R_A, solvation number S_n^(0 ), acoustic impedance Z are also calculated. Interpretations of these parameters in the light of molecular interactions are made. It is found that the compressibility of the solutions and the solvent decrease with a concentration of electrolyte and amount of d-sorbitol as a result of the structure breaking property of alkali metal ions and electrostriction of the solvation shells. The presence of strong ion-solvent interaction in the solution is supported by the values of the derived parameters.

Acoustical Studies of Ternary Liquid Mixtures of 2-Aminothiazole in DMF-Water at Different Temperatures

2015 ◽  
Vol 59 ◽  
pp. 188-198 ◽  
Author(s):  
P.B. Morey ◽  
A.B. Naik
Keyword(s):  
Composition Range ◽  
Ultrasonic Method ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Relative Strength ◽  
Ultrasonic Velocities ◽  
Solvent Interaction ◽  
Volume Viscosity ◽  
Different Temperatures ◽  
Apparent Molar Compressibility

The nature and the relative strength of the intermolecular interaction between the components of the liquid mixtures have been successfully investigated by ultrasonic method. In present study, the densities (ρ), ultrasonic velocities (u), viscosity (ɳ) and refractive index (nD) in a ternary liquid mixture of 2-aminothiazole with N,N-dimethylformamide (DMF) in water have been measured at 303.15, 308.15, 313.15,318.15 and 323.15 K respectively, over the entire composition range by using densitometer, ultrasonic interferometer, viscometer and refractmeter respectively. The measured data have been used to compute the various thermo-acoustic parameters using the standard relations namely, adiabatic compressibility (βs), intermolecular free length (Lf), specific acoustic Impedance (Z),Wada constant (W), molar sound velocity (R), relative association (RA), apparent molar compressibility (),apparent molar volume () viscosity relaxation time (Г),absorption coefficient, internal pressure (ᴨ),free volume (Vf),Gibb҆ s free energy (∆G) and specific refraction (r), etc. The results have been analyzed on the basis of variation in thermodynamic parameters. These parameters are useful for explaining the molecular association and interaction between the components of ternary liquid mixtures. The variation in densities and ultrasonic velocities with concentrations in the system show similar trends for evaluated parameters of the constituents in ternary mixture at different temperatures. The results have been interpreted in terms of solute-solvent and solvent-solvent interaction.

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 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 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.

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 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.

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