Vapor pressure of liquid argon, krypton, and xenon

Abstract

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.

Solid-Vapor and Liquid-Vapor Phase Equilibria for the Helium-Krypton System

“…There is some scattering in the data, particularly at low helium concentrations, due primarily to difficulty in accurate sampling and analysis at such low7 concentration levels. Straight lines, passing through the krypton vapor pressure values (Bowman, et al 1969) at zero helium composition, seem to represent the isotherms well. The small number of data points per isotherm and the limited pressure range of the study do not justify more complex curves to be drawn.…”

“…The fugacity coefficient of pure krypton under its own vapor pressure ( °) was obtained both from the Redlich-Kwong equation (Redlich and Kwong, 1949) The compressibility factors (Z) were calculated from the Redlich-Kwong equation and the values of Bn were computed using the method of Prausnitz and Myers (1963). The vapor pressure data for krypton were taken from Bowman, et al (1969). The 0i°v alues calculated by the two equations agree to within 0.2%.…”

The vaporization properties of krypton and xenon

“…for xenon [20,35,37,50,55]. Equation (6) were arrived at for krypton from equations (2) and (3), respectively.…”

“…(2); (b) the p calc represents the values calculated from equation (3), with the parameters given in the text. Legend: , reference [17]; s, reference [18]; h, reference [19]; N, reference [20]; O, reference [21,23,27,28]; +, reference [22]; , reference [24]; Â, reference [25]; 4, reference [26]; , reference [29]; ., reference [30]; }, reference [31]; d, critical point [32]. (6) with the parameters given in the text.…”

“…Deviation plots of the vapour pressures from equations (2) (2); (b) the p calc represents the values calculated from equation (3), with the parameters given in the text. Legend: N, reference [20]; , reference [23,29,39,47]; M, reference [26]; ., reference [30]; s, reference [40]; j, reference [41]; +, reference [42]; Â, reference [43]; , reference [44]; , reference [45]; , reference [46]; }, reference [48]; , reference [49]; , reference [50]; h, reference [51]; , reference [52]; , reference [53][54][55]; , reference [56][57][58][59]; Ç, reference [60]; d, critical point, this work. from q c,m = 1.1154 g Á cm À3 which is the average of the two experimental values found by Narger and Balzarini [63].…”