AN EXPERIMENTAL DETERMINATION OF THE SURFACE ENTHALPY OF SODIUM CHLORIDE

1956 ◽  
Vol 34 (11) ◽  
pp. 1553-1556 ◽  
Author(s):  
G. C. Benson ◽  
H. P. Schreiber ◽  
F. Van Zeggeren
Keyword(s):  
Sodium Chloride ◽  
Specific Surface ◽  
Experimental Determination ◽  
Special Care ◽  
Heats Of Solution ◽  
Surface Areas ◽  
Specific Surface Areas ◽  
Surface Enthalpy ◽  
Excess Sodium

The surface enthalpy of NaCl has been redetermined from heats of solution of salt samples of different specific surface areas. Special care was taken in the preparation of these samples to avoid contamination by nitrate and excess sodium. The value obtained, 276 ergs/cm.2, differs from that reported by Benson and Benson, viz. 305 ergs/cm.2, for samples containing some nitrate impurity.

Evaluations of the BET, I-Point, and α-Plot Procedures for the Routine Determination of External Specific Surface Areas of Highly Dispersed and Porous Silicas

Langmuir ◽  
2011 ◽  
Vol 27 (1) ◽  
pp. 187-195 ◽  
Author(s):  
Kenneth E. Collins ◽  
Carol H. Collins ◽  
Camila M. Maroneze ◽  
Vanessa Cappovila ◽  
Rogério Custodio
Keyword(s):  
Specific Surface ◽  
Surface Areas ◽  
Highly Dispersed ◽  
Specific Surface Areas

Determination of low specific surface areas of minerals and oxides by gas–solid chromatography

1982 ◽  
Vol 60 (22) ◽  
pp. 2859-2862 ◽  
Author(s):  
Peter R. Tremaine ◽  
Alfred G. Wikjord ◽  
Jacques C. Leblanc
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Retention Volume ◽  
Volume Data ◽  
Surface Areas ◽  
Specific Surface Areas ◽  
Bet Equation

Gas–solid chromatography is shown to provide a method for measuring the specific surface area of non-porous particulate mineral or oxide samples in the range 0.005 to 0.5 m2 g−1 with precision as high as ±10%. Mesitylene is a convenient sorbate and was found to occupy an area of 71 ± 5 Å2 per molecule on silicate surfaces, by calibration with glass particles having well defined surface geometries. The rather low values obtained for the C parameter, when fitting retention volume data to the BET equation, suggest that the area occupied by mesitylene may be affected by the surface on which it is adsorbed. Hydrocarbon contaminants are a major interference. No specialized instrumentation is required.

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