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.

Some Thermodynamic Properties of the Dimethylsulfoxide–Water and Propylene Carbonate–Water Systems at 25 °C

1974 ◽  
Vol 52 (5) ◽  
pp. 718-722 ◽  
Author(s):  
S. Y. Lam ◽  
R. L. Benoit
Keyword(s):  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Propylene Carbonate ◽  
Water Systems ◽  
Pressure Measurements ◽  
Free Energies ◽  
Carbonate Water ◽  
Enthalpies Of Mixing ◽  
Molar Excess ◽  
Vapor Pressure Measurements

Molar excess free energies of the systems dimethylsulfoxide–water and propylene carbonate–water have been calculated from static vapor pressure measurements at 25 °C. Enthalpies of mixing at low water concentrations have also been determined. Possible association interactions in these systems are discussed.

Some thermodynamic properties of the sulfolane–benzene and sulfolane–dichloromethane systems

1969 ◽  
Vol 47 (22) ◽  
pp. 4195-4198 ◽  
Author(s):  
R. L. Benoit ◽  
J. Charbonneau
Keyword(s):  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Infinite Dilution ◽  
Partial Molar Volumes ◽  
Refractive Indices ◽  
Pressure Measurements ◽  
Free Energies ◽  
Volumes Of Mixing ◽  
Excess Partial Molar Volumes ◽  
Vapor Pressure Measurements

Molar excess free energies of the systems sulfolane-benzene and sulfolane–dichloromethane have been calculated from static vapor pressure measurements at 30.00 °C. Refractive indices, excess partial molar volumes of mixing, and enthalpies of mixing at infinite dilution of benzene and dichloromethane were also determined.

Measurement of the vapor pressure of methanol-n-decanol and ethanol-n-decanol mixtures

1968 ◽  
Vol 46 (8) ◽  
pp. 1249-1254 ◽  
Author(s):  
Jaswant Singh ◽  
G. C. Benson
Keyword(s):  
Vapor Pressure ◽  
Pressure Measurements ◽  
Free Energies ◽  
Temperature Range ◽  
Molar Excess ◽  
Vapor Pressure Measurements

Molar excess Gibbs free energies of mixtures of methanol and ethanol with n-decanol were obtained from static vapor pressure measurements over the temperature range 20–50 °C. The molar excess entropies of the system methanol–decanol are predominantly negative at 25 °C; those of ethanol–decanol are positive.

Vapor–liquid equilibrium studies of n-propanol–n-decanol mixtures

1968 ◽  
Vol 46 (12) ◽  
pp. 2065-2069 ◽  
Author(s):  
Jaswant Singh ◽  
G. C. Benson
Keyword(s):  
Vapor Pressure ◽  
Similar Data ◽  
Pressure Measurements ◽  
Free Energies ◽  
Liquid Equilibrium ◽  
Equilibrium Studies ◽  
Vapor Liquid Equilibrium ◽  
Temperature Range ◽  
Molar Excess ◽  
Vapor Pressure Measurements

Static vapor pressure measurements were made on mixtures of n-propanol with n-decanol over the temperature range 20–50 °C. From the results, the molar excess Gibbs free energies were calculated. The applicability of the principle of congruence to these values and to similar data published previously for methanol–decanol and ethanol–decanol systems was examined.

Excess thermodynamic properties of isopropanol–n-decanol mixtures

1969 ◽  
Vol 47 (4) ◽  
pp. 543-546 ◽  
Author(s):  
Jaswant Singh ◽  
H. D. Pflug ◽  
G. C. Benson
Keyword(s):  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Pressure Measurements ◽  
Free Energies ◽  
Excess Thermodynamic Properties ◽  
Temperature Range ◽  
Molar Excess ◽  
Volumes Of Mixing ◽  
Vapor Pressure Measurements

Molar excess Gibbs free energies, obtained from static vapor pressure measurements on isopropanol–n-decanol mixtures over the temperature range 20–50 °C, are reported. Results of direct determinations of heats and volumes of mixing at 25 °C are also presented.

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