Thermodynamics of aqueous mixtures of electrolytes and nonelectrolytes. IX. Nitromethane in pure water and in 1 m potassium chloride from 15 to 35.deg.

1970 ◽  
Vol 74 (1) ◽  
pp. 167-169 ◽  
Author(s):  
John H. Stern ◽  
J. T. Swearingen
Keyword(s):  
Potassium Chloride ◽  
Pure Water ◽  
Aqueous Mixtures ◽  
Mixtures Of Electrolytes

Temperature Dependent Solubility of Benzoic Acid in Aqueous Phase and Aqueous Mixtures of Aliphatic Alcohols

2020 ◽  
Vol 234 (11-12) ◽  
pp. 1771-1787
Author(s):  
Sayyar Muhammad ◽  
Sofia Sanam ◽  
Hamayun Khan ◽  
Akhtar Muhammad ◽  
Sabiha Sultana
Keyword(s):  
Benzoic Acid ◽  
Aqueous Phase ◽  
Linear Trend ◽  
Pure Water ◽  
Binary Solvents ◽  
Aqueous Mixtures ◽  
Analytical Technique ◽  
Temperature Range ◽  
Acid Solubility ◽  
Ethanol In Water

AbstractThe benzoic acid solubility in aqueous phase and in various aqueous mixtures of methanol, ethanol and 2-propanol was determined at temperatures ranging from 303 to 333 K by an analytical technique. The results showed that the solubility of the acid in alcohols-water binary mixtures is high as compared to pure aqueous phase. The addition of alcohols to water favors the dissolution of benzoic acid which increases further with the increase in alcohols content of water within the investigated temperature range. The benzoic acid solubility in water alone and aqueous mixtures of the selected alcohols was in the order of; 2-propanol in water > ethanol in water > methanol in water > pure water. It is also observed that within the investigated temperature range, the acid solubility increases with rise in temperature in both the aqueous phase and alcohols-water binary solvents. The logarithm of the mole fraction of the acid’s solubility also showed a linear trend against the temperature. The experimental results obtained in the current study were compared with the reported literature for the studied acid and other organic acids in various solvents and showing a good agreement. The study will have implications in the processes involving separation, crystallization and pharmaceutical formulation in various industries.

Thermal Anomaly in the Temperature Dependence of the Energy–Volume Coefficient of Aqueous KCl Solutions

1973 ◽  
Vol 51 (12) ◽  
pp. 1885-1888 ◽  
Author(s):  
Ikchoon Lee ◽  
J. B. Hyne
Keyword(s):  
Aqueous Solution ◽  
Temperature Dependence ◽  
Potassium Chloride ◽  
Direct Measurement ◽  
Pure Water ◽  
Pressure Coefficient ◽  
Thermal Anomaly ◽  
Thermal Pressure ◽  
Temperature Range ◽  
Volume Coefficient

The temperature dependence of the energy–volume coefficient of pure water and of aqueous potassium chloride solutions as a function of concentration over the temperature range 10–50 °C has been determined by direct measurement of constant volume thermal–pressure coefficient. The results show that a thermal anomaly exists in the energy–volume coefficient of aqueous solution in the temperature range 30–40 °C and becomes more pronounced as the concentration of solute is increased.

Aqueous Mixtures with Nonpolar Gases at High Pressures and Supercritical Temperatures

1983 ◽  
Vol 22 ◽  
Author(s):  
E.U. Franck
Keyword(s):  
Dielectric Constant ◽  
High Pressures ◽  
Pure Water ◽  
Boundary Surface ◽  
Type Equation ◽  
Critical Curve ◽  
Aqueous Mixtures ◽  
Two Phase ◽  
Slow Increase ◽  
Critical Curves

ABSTRACTPTx-phase diagrams and critical curves for binary aqueous systems are briefly discussed. New results of the two-phase boundary surface and the critical curve for the water-nitrogen system to 2500 bar and 400°C are presented as isotherms in the Px-plane. A new extended Carnahan-Starling and squarewell type equation permits calculations of spinodal isopleths of the water-methane system and a prediction of the critical curve. - Excess volumes of supercritical benzene-water mixtures are given as functions of composition and pressure. Excess Gibbs energies and activity coefficients are derived. For the same system the static dielectric constant was measured between 300 and 400 °C in the homogeneous supercritical fluid for all concentrations. At 400 °C and 2000 bar the dielectric constant of pure water is 20 and decreases steeply with the addition of benzene. Addition of water to benzene causes at first only a slow increase above the value of 2 (for pure benzene). A short discussion of the description of the dielectric constant of such polar-nonpolar mixtures for wide ranges of density is given. - The solubility of anthracene in high density water to 250 °C was measured spectroscopically. Data are given. The “enhancement factor” is high at low temperature but decreases to unity at 250 °C and a water density of 1 g . cm−3

Prediction of high-pressure gas solubilities in aqueous mixtures of electrolytes

1991 ◽  
Vol 30 (9) ◽  
pp. 2180-2185 ◽  
Author(s):  
Kim Aasberg-Petersen ◽  
Erling Stenby ◽  
Aage Fredenslund
Keyword(s):  
High Pressure ◽  
Aqueous Mixtures ◽  
Mixtures Of Electrolytes ◽  
Gas Solubilities

Measurements of the (p, ρ,T) properties and virial coefficients of pure water, methane,n-hexane,n-octane, benzene, and of their aqueous mixtures in the supercritical region

1996 ◽  
Vol 28 (9) ◽  
pp. 1037-1057 ◽  
Author(s):  
I.M. Abdulagatov ◽  
A.R. Bazaev ◽  
R.K. Gasanov ◽  
A.E. Ramazanova
Keyword(s):  
Pure Water ◽  
Virial Coefficients ◽  
Aqueous Mixtures ◽  
Supercritical Region

Thermodynamics of aqueous mixtures of electrolytes and nonelectrolytes. V. Enthalpies of transfer in the limiting region at 25.deg.

1968 ◽  
Vol 72 (8) ◽  
pp. 3053-3054
Author(s):  
J. H. Stern ◽  
J. Lazartic ◽  
D. Fost
Keyword(s):  
Aqueous Mixtures ◽  
Enthalpies Of Transfer ◽  
Mixtures Of Electrolytes
Sign in / Sign up

Export Citation Format

Share Document