Orthobaric data of certain pure liquids in the neighborhood of the critical point

1968 ◽  
Vol 46 (4) ◽  
pp. 575-581 ◽  
Author(s):  
A. N. Campbell ◽  
R. M. Chatterjee
Keyword(s):  
Critical Temperature ◽  
Vapor Pressure ◽  
Critical Point ◽  
Critical Phenomena ◽  
Horizontal Straight Line ◽  
Straight Line

The orthobaric densities of liquid and vapor, and the vapor pressure, have been determined for the three pure liquids, acetone, chloroform, and benzene. It is shown that the nose of the curve, representing orthobaric densities (or volumes) as a function of temperature, though very flat, is probably not a horizontal straight line. Nevertheless, critical phenomena can be observed over a range of total volume, at the critical temperature.

Vapor pressure of liquid argon, krypton, and xenon

1969 ◽  
Vol 47 (3) ◽  
pp. 267-273 ◽  
Author(s):  
D. H. Bowman ◽  
Ronald A. Aziz ◽  
C. C. Lim
Keyword(s):  
Experimental Data ◽  
Regression Analysis ◽  
Critical Temperature ◽  
Vapor Pressure ◽  
Liquid Argon ◽  
Quantum Corrections ◽  
Functional Relations ◽  
Potential Parameters ◽  
Corresponding States Principle ◽  
Pressure Analysis

The vapor pressure of liquid argon, krypton, and xenon was measured from below the normal boiling temperature to close to the critical temperature. Functional relations were fitted by a multiple regression analysis to the experimental data. Data of other authors are compared directly with the results presented here.Comparison of the vapor pressure curves for the three liquids showed that the classical corresponding states principle was obeyed only poorly and that it was necessary to include quantum corrections in comparing the reduced curves. The adjusted reduction factors agreed reasonably well with those found from vapor pressure analysis by other workers. De Boer plots on the basis of our potential parameters are more linear than those using the parameters of Boato and Casanova.

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