Determination of hydration number of an electrolyte by vapor pressure measurements

1978 ◽  
Vol 82 (25) ◽  
pp. 2699-2701 ◽  
Author(s):  
Chai-Fu Pan
Keyword(s):  
Vapor Pressure ◽  
Hydration Number ◽  
Pressure Measurements ◽  
Vapor Pressure Measurements

DETERMINATION OF THE ACTIVITIES OF MAGNESIUM IN LIQUID MAGNESIUM–TIN ALLOYS BY VAPOR PRESSURE MEASUREMENTS

1962 ◽  
Vol 40 (4) ◽  
pp. 718-728 ◽  
Author(s):  
S. Ashtakala ◽  
L. M. Pidgeon
Keyword(s):  
Vapor Pressure ◽  
Liquid Alloy ◽  
Composition Range ◽  
Entire Composition Range ◽  
Pressure Measurements ◽  
Free Energies ◽  
Tin Alloys ◽  
Vapor Pressure Measurements

The vapor pressure of liquid magnesium–tin alloys has been measured between 780 °C and 1010 °C using the isopiestic method.Activities of magnesium were obtained at 800 °C, 910 °C, and 940 °C. Activities of tin showed a negative departure from ideality, and those of magnesium, both negative and a slight positive departure.Partial heats and entropies of mixing were calculated, and values are negative for most of the composition range. Partial free energies of mixing for the entire composition range showed negative values. Integral heats, entropies, and free energies were calculated from the partial quantities. These values were negative, indicating an ordered liquid alloy.

Rapid Vapor-Collection Method for Vapor Pressure Measurements of Low-Volatility Compounds

2020 ◽  
Vol 92 (24) ◽  
pp. 16253-16259
Author(s):  
Megan E. Harries ◽  
Cheryle N. Beuning ◽  
Bridger L. Johnston ◽  
Tara M. Lovestead ◽  
Jason A. Widegren
Keyword(s):  
Vapor Pressure ◽  
Pressure Measurements ◽  
Collection Method ◽  
Vapor Collection ◽  
Vapor Pressure Measurements

Zur Thermodynamik der hydrophoben Wechselwirkung; die Systeme Wasser + Glycin+ Harnstoff und Wasser + Alanin+ Harnstoff bei 25 °C / Thermodynamics of Hydrophobie Interaction in the Systems Water + Glycin + Urea and Water + Alanin + Urea at 25 °C

1973 ◽  
Vol 28 (9-10) ◽  
pp. 533-554 ◽  
Author(s):  
Lothar Rafflenbeul ◽  
Wa-Ming Pang ◽  
Hansjürgen Schönert ◽  
Klaus Haberle
Keyword(s):  
Amino Acid ◽  
Magnetic Resonance ◽  
Proton Magnetic Resonance ◽  
Pressure Measurements ◽  
Free Enthalpy ◽  
Heat Of Dilution ◽  
Ternary Solutions ◽  
Vapor Pressure Measurements ◽  
Calorimetric Determination

Abstract Isopiestic vapor pressure measurements and calorimetric determination of the heat of dilution have been performed and evaluated with respect to enthalpy, entropy and free enthalpy in the ternary solutions water+ glycin+ urea and water+ alanin + urea. The free enthalpy of transfer for the process: Amino acid from water to water+ urea, which can be derived from these measurements, does not agree with the value calculated from solubility measurements. The reason for this discrepancy and the values of entropy and enthalpy in terms of hydrophobic interaction are discussed. Supplementary measurements of the proton magnetic resonance in these solutions are included.

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