Vapour pressure measurements and thermodynamic properties of aqueous solutions of sodium acetate

2002 ◽  
Vol 34 (7) ◽  
pp. 1057-1071 ◽  
Author(s):  
Roland Beyer ◽  
Michael Steiger
Keyword(s):  
Thermodynamic Properties ◽  
Aqueous Solutions ◽  
Vapour Pressure ◽  
Sodium Acetate ◽  
Pressure Measurements

scholarly journals Thermodynamic properties of the liquid Hg-Tl alloys determined from vapour pressure measurements

2002 ◽  
Vol 38 (3-4) ◽  
pp. 237-247 ◽  
Author(s):  
W. Gierlotka ◽  
K. Fitzner ◽  
M. Sukiennik
Keyword(s):  
Thermodynamic Properties ◽  
Activity Coefficients ◽  
Thermodynamic Functions ◽  
Vapour Pressure ◽  
Pressure Measurements ◽  
Temperature Range ◽  
Liquid Solutions ◽  
Partial Vapour Pressure

The partial vapour pressure of mercury over liquid Hg-Tl liquid solutions were determined in the temperature range from 450 to 700 K by direct vapour pressure measurements carried out with the quartz gauge. From the measured ln pHg vs. T relationships activities of mercury were determined. Using Redlich-Kister formulas logarithms of the activity coefficients were described with the following equations: From which all thermodynamic functions in the solutions can be derived.

Thermodynamic properties of the alkali metal hexachloroniobate and hexachlorotantalate compounds by vapour pressure measurements

1978 ◽  
Vol 56 (19) ◽  
pp. 2538-2545 ◽  
Author(s):  
Donald R. Sadoway ◽  
S. N. Flengas
Keyword(s):  
Thermodynamic Properties ◽  
Alkali Metal ◽  
Metal Cation ◽  
Vapour Pressure ◽  
Binary Systems ◽  
Alkali Metal Cation ◽  
Pressure Gauge ◽  
Pressure Measurements ◽  
Partial Pressures ◽  
Fused Quartz

The vapour pressures for the decomposition of the solid and liquid compounds AMCl6 where A = Na, K, Rb, or Cs, and M = Nb or Ta, were measured by a fused quartz Bourdon spiral pressure gauge. The hexachlorotantalates were found to be more stable thermally than the hexachloroniobates. Enthalpies of decomposition were calculated. The dissociation temperatures of each sequence of compounds increase with increasing size of the radius of the alkali-metal cation. Partial pressures of NbCl5 or TaCl5 vapour in equilibrium with solutions representing the binary Systems KCl–KNbCl6 and KCl–KTaCl6, respectively, are also reported.

Thermodynamic properties of (n-alkoxyethanols + organic solvents). XII. Total vapour pressure measurements for (n-hexane,n-heptane or cyclohexane + 2-methoxyethanol) at different temperatures

2001 ◽  
Vol 33 (1) ◽  
pp. 47-59 ◽  
Author(s):  
F.Javier Carmona ◽  
Venkat R. Bhethanabotla ◽  
Scott W. Campbell ◽  
J. Antonio González, ◽  
Isaías García de la Fuente ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
Organic Solvents ◽  
Vapour Pressure ◽  
Pressure Measurements ◽  
Different Temperatures

A vapour-pressure study of mixtures of bromine and chlorine

1968 ◽  
Vol 21 (2) ◽  
pp. 287 ◽  
Author(s):  
GH Chessman ◽  
DL Scott
Keyword(s):  
Binary System ◽  
Thermodynamic Properties ◽  
Phase Equilibria ◽  
Phase Diagrams ◽  
Vapour Pressure ◽  
Pressure Measurements ◽  
Compound Formation

Phase equilibria in the system bromine-chlorine have been examined by vapour-pressure measurements, with a primary view to obtaining information on the nature of the solid mixtures. The work has led to some modification of the earlier phase diagrams and to a general discussion on the thermodynamic properties of this binary system in which compound formation is known to occur.

scholarly journals Water Activity

2012 ◽  
Vol 27 ◽  
pp. 565-569 ◽  
Author(s):  
O. F. Nielsen ◽  
M. Bilde ◽  
M. Frosch
Keyword(s):  
Surface Tension ◽  
Vapor Pressure ◽  
Aqueous Solutions ◽  
Vapour Pressure ◽  
Pure Water ◽  
Free Water ◽  
Water Molecules ◽  
Pressure Measurements ◽  
Metabolic Activities ◽  
Vapor Pressure Measurements

Microorganisms require water for their metabolic activities. Only a fraction of water in foodstuffs, the so-called free water, is available for this purpose. The amounts of free water previously estimated by two different methods (Frosch et al. (2010), Frosch et al. (2011), and Low (1969)) are compared for aqueous solutions of four electrolytes, NaCl, NH4Cl, Na2SO4, (NH4)2SO4: (i) vapour pressure measurements of the solutions relative to that of pure water (water activities) and (ii) low-wavenumber Raman spectra in the R(ν)-representation. For each electrolyte deviations were found between results from the two methods. All water molecules in the illuminated volume contribute to the Raman data. The vapor pressure measurements refer to water molecules at the water/atmosphere interface where surface tension is important. Differences in surface tension for the four electrolytes qualitatively explain deviations between the amounts of “free water” observed by the two methods.

Vapour-pressure measurements and thermodynamic properties; 1,3,5-tribromobenzene

2010 ◽  
Vol 107 (3) ◽  
pp. 273-277 ◽  
Author(s):  
J. Huinink ◽  
J. C. van Miltenburg ◽  
H. A. J. Oonk ◽  
A. Schuijff
Keyword(s):  
Thermodynamic Properties ◽  
Vapour Pressure ◽  
Pressure Measurements
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