scholarly journals Studies of internal pressure in aqueous solutions of a surfactant (decyltrimethylammonium bromide) at 298.15 K: Understanding and use of Gibson−Tait equation

2020 ◽  
Vol 1 ◽  
pp. 100003
Author(s):  
Vasim R. Shaikh ◽  
Preeti A. Tomar ◽  
Kesharsingh J. Patil
Keyword(s):  
Aqueous Solutions ◽  
Internal Pressure ◽  
Tait Equation ◽  
Decyltrimethylammonium Bromide

Effects of pressure and temperature on the structure of liquid acetone

1967 ◽  
Vol 45 (2) ◽  
pp. 123-130 ◽  
Author(s):  
W. A. Adams ◽  
K. J. Laidler
Keyword(s):  
Heat Capacity ◽  
Internal Pressure ◽  
Structural Changes ◽  
Constant Volume ◽  
Tait Equation ◽  
Liquid Acetone ◽  
Structure Of Liquid

The compressibility of acetone has been redetermined at temperatures of 25 to 55 °C, and at pressures from atmospheric to 1 kbar. The results have been fitted to the Tait equation, and values of (∂P/∂T)V and of the internal pressure have been calculated. The heat capacity at constant volume has also been deduced as a function of pressure and temperature. The variations in these and other derived quantities have been shown to lead to conclusions about structural changes in the liquid.

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.

scholarly journals Micellar Parameters of Aqueous Solutions of Tween 20 and 60 at Different Temperatures: Volumetric and Viscometric Study

2018 ◽  
Vol 2 (3) ◽  
pp. 34 ◽  
Author(s):  
Katarzyna Szymczyk ◽  
Magdalena Szaniawska ◽  
Anna Taraba
Keyword(s):  
Aqueous Solutions ◽  
Internal Pressure ◽  
Isentropic Compressibility ◽  
Bulk Water ◽  
Tween 20 ◽  
Hydration Numbers ◽  
Sorbitan Monolaurate ◽  
Different Temperatures ◽  
Tween 60 ◽  
Viscometric Study

Density, viscosity and speed of sound of aqueous solutions of nonionic surfactants such as polyoxyethylene (20) sorbitan monolaurate (Tween 20) and polyoxyethylene (20) sorbitan monostearate (Tween 60) at T = 293, 303 and 313 K are reported. From these measured values different parameters such as, for example, isentropic compressibility, molecular free length, acoustic impedance, primary hydration numbers and internal pressure have been calculated and employed to discuss molecular packing, structural alteration and molecular interactions. The variation in these parameters with temperature indicates that the mobility of surfactant molecules increases the disordered state of the liquid (surfactant + water) due to irregular packing of the molecules. Also, for Tween 20 solutions, more conversion to bulk water of the structured water molecules was observed, obtaining lower compressibilities and higher values of hydration numbers as well as internal pressure for a given T.

Effect of Pressure on Adiabatic Compressibility of Aqueous Solutions of Decyltrimethylammonium Bromide

1995 ◽  
Vol 170 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Kazuhiro Fukada ◽  
Akihiro Oishi ◽  
Masatoshi Fujii ◽  
Toshiaki Shirakawa ◽  
Tadashi Kato ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Adiabatic Compressibility ◽  
Effect Of Pressure ◽  
Decyltrimethylammonium Bromide

A Molecular Dynamics Study of Aqueous Solutions

1976 ◽  
Vol 31 (5) ◽  
pp. 476-481 ◽  
Author(s):  
P. C. Vogel ◽  
K. Heinzinger
Keyword(s):  
Molecular Dynamics ◽  
Aqueous Solutions ◽  
Internal Pressure ◽  
Chloride Ions ◽  
Water Molecules ◽  
Sodium Ions ◽  
Nacl Solution ◽  
Hydration Shells

Abstract Results of a molecular dynamics study of a 0.55 molal aqueous NaCl solution are reported. The basic periodic box contained 200 water molecules, 2 sodium ions and 2 chloride ions. The calculated properties of this solution are compared with those obtained previously for a 2.2 molal NaCl solution. The formation of second hydration shells, an increase of the number of water molecules in the first hydration shells, and a release of internal pressure are the main changes connected with a decrease of the concentration.

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