Study of internal pressure and free volume of urea solutions in water-dimethyl sulphoxide mixtures from ultrasonic velocity

Ultrasonics ◽  
1989 ◽  
Vol 27 (1) ◽  
pp. 54-56 ◽  
Author(s):  
S.O. Pillai ◽  
V. Murugesan ◽  
S. Natarajan
Keyword(s):  
Internal Pressure ◽  
Free Volume ◽  
Ultrasonic Velocity ◽  
Dimethyl Sulphoxide

scholarly journals Excess Acoustical Properties and Molecular Interactions in Ternary Liquid Mixtures of 3(Meta)Methoxy Phenol, 1 Propanol and n- Hexane at 303 K, 308 K & 313 K using Ultrasonic Techniques

2019 ◽  
Vol 8 (10S) ◽  
pp. 99-105 ◽  
Keyword(s):  
Internal Pressure ◽  
Free Volume ◽  
Ultrasonic Velocity ◽  
Molecular Interactions ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Ternary Mixtures ◽  
Excess Properties ◽  
Acoustical Parameters ◽  
Free Length

The Ultrasonic velocity(U), density(ρ), and viscosity(η) have been measured experimentally for the ternary liquid mixtures of 3(meta) methoxy phenol(MMP), 1 propanol and n hexane at various temperatures viz., 303 K, 308 K and 313 K at constant frequency of 2 MHz. for different concentrations ranges from 0.001M to 0.01M. The thermodynamic and acoustical parameters such as adiabatic compressibility(β), Rao constant(R), absorption coefficient (α/f2 ), internal pressure(πi), cohesive energy(CE), free volume(Vf), free length(Lf), acoustic impedence(z), available volume(Va), viscous relaxation time and Lenard Jones potential were calculated from the experimental data. The various excess properties including excess Ultrasonic velocity, excess acoustic impedence, excess free length, excess adiabatic compressibility, excess free volume and excess internal pressure were also computed. The variation of these excess parameters with respect to concentration and temperatures have been discussed in the light of molecular interaction. The molecular interactions were predicted based on the results obtained for ultrasonic velocities of different concentrations of the ternary mixtures at different temperatures.

MOLECULAR INTERACTION THROUGH FREE VOLUME AND INTERNAL PRESSURE OF AQUEOUS AMINO ACIDS AT 308.15 K

2014 ◽  
Author(s):  
Amardeep Shende Hemant Baradkar Vilas Tabhane Amardeep Shende Hemant Baradkar Vilas Tabhane ◽  
Keyword(s):  
Amino Acids ◽  
Internal Pressure ◽  
Free Volume ◽  
Molecular Interaction

scholarly journals Acoustic, thermal and optical properties of organic based disodium tartrate salt

2021 ◽  
Vol 2 (1) ◽  
pp. 012-027
Author(s):  
M. Sathish ◽  
K. Venkataramanan ◽  
R. Padmanaban ◽  
Helan Ruth ◽  
K. Vadivel ◽  
...  
Keyword(s):  
Optical Properties ◽  
Aqueous Solutions ◽  
Internal Pressure ◽  
Ultrasonic Velocity ◽  
Relative Viscosity ◽  
Adiabatic Compressibility ◽  
Lower Percentage ◽  
Wada’S Constant ◽  
Different Temperatures ◽  
Solvent Molecules

In this work, acoustic, thermal, and optical properties were tested on the different concentrations of the Disodium Tartrate solutions. First, the viscosity studies were analyzed for the Disodium tartrate in the concentration range from 2% to 20% with different temperatures 303K, 308K, 313K, and 318K. It was noted that the relative viscosity and the activation energy of the prepared compound increase with increases in concentration and decreases with temperature increases. The properties like density and ultrasonic velocity are varied when increases the concentration of the aqueous solutions of Disodium Tartrate. In this study, the values of adiabatic compressibility show an inverse behavior when compared with ultrasonic velocity due to the interaction between solute and solvent molecules. Also observed that the inter-molecular free length is maximum for a lower percentage. The free volume for the compound is maximum at 2% and a minimum of 20%, since it reduces when the internal pressure increases. It was revealed that the classical absorption coefficient and relaxation time for Disodium Tartrate is minimum for lower percentage and minimum for a higher percentage. The interactions between the solute and solvent are confirmed through the property like specific Acoustical impedance. It was noted that the increase in internal pressure increases the concentration of the compound. The ion-solvent interaction was discussed by the relative association study, thus the values of relative association increases with an increase in concentration. The Rao’s and Wada’s constant increases linearly in aqueous solutions of Disodium Tartrate for the entire system.

Calculation of the Free Volume and the Internal Pressure of Liquids from Sonic Velocity Data

1956 ◽  
Vol 25 (3) ◽  
pp. 581-581 ◽  
Author(s):  
F. C. Collins ◽  
W. W. Brandt ◽  
M. H. Navidi
Keyword(s):  
Internal Pressure ◽  
Free Volume ◽  
Sonic Velocity ◽  
Velocity Data
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