Thermodynamics of liquid mixtures of xenon and hydrogen chloride

Calado, Jorge C. G.; Kozdon, Andrzej F.; Morris, Peter J.; Ponte, Manuel Nunes da; Staveley, L. A. K.; Woolf, L. A.

doi:10.1039/f19757101372

Cited by 40 publications

(10 citation statements)

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“…The Xe/HCl system has a positive azeotrope which is well reproduced by the theory, and apparently exhibits liquid-liquid immiscibility at low temperatures (27). The theory predicts the vapor-liquid compositions and pressures well at each temperature, the maximum error being 0.1 bar, and also reproduces the excess volume.…”

Section: -> II -> (V) •> (Iv) -> Iiimentioning

confidence: 89%

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Polar and Quadrupolar Fluid Mixtures

Gubbins

Twu

1977

ACS Symposium Series

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Phase equilibrium calculations may be made by either semiempirical or theoretical methods. In the semiempirical approach one uses an empirical equation of state for one or more of the phases involved; for the liquid phase one of the empirical equations for the excess Gibbs energy (Wilson, van Laar, etc.) is usually used. The semiempirical approach gives good results provided that one has a significant amount of experimental data available for the mixture.However, such methods are better suited to interpolation of existing data than to extrapolation or prediction. Theoretical methods are based in statistical thermodynamics, require less mixture data, and should be more reliable for prediction. Theoretically-based methods that have found extensive use by chemical engineers include regular solution theory (1), corresponding states methods (conformal solution theory) (2-4), and perturbation expansions based on a hard sphere fluid as reference system (3,_4) • F o r mixtures of simple nonpolar molecules these methods give good results, especially the corresponding states and perturbation expansion theories (3). However, all three theories are based on the assumption that the molecules are spherical, with intermolecular forces that are a function only of the intermolecular separation. This assumption is strictly valid only for mixtures of the inert gases (Ar, Kr, Xe) and for certain fused salts and liquid metals. In spite of this restriction the corresponding states and perturbation methods have been applied with success to mixtures in which the intermolecular forces depend on the molecular orientations, e.g., mixtures containing 02, N 2 , light hydrocarbons, etc. (see ref. 4 for review of applications up to 1973). The extension to weakly nonspherical molecules can be accomplished, for example, by introducing shape factors as suggested by Leland and his colleagues (5). These methods have been extensively exploited for both thermodynamic (2) and transport (6) properties. They are predictive only if equations are available for the composition dependence of the shape factors. The existing methods for doing this work well for relatively simple mixtures, but break down when constituents with 344 Downloaded by GEORGE MASON UNIV on December 20, 2014 |

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Section: -> II -> (V) •> (Iv) -> Iiimentioning

confidence: 89%

“…Figures 7 and 8 show a comparison of theory and experimental data of Calado €it al. (27,28) for vapor-liquid equilibrium in the systems Xe/HCl and Xe/HBr. Figure 9 shows a comparison for the excess volume for Xe/HBr (similar agreement is obtained for Xe/ HC1).…”

Section: -> II -> (V) •> (Iv) -> Iiimentioning

confidence: 99%

Polar and Quadrupolar Fluid Mixtures

Gubbins

Twu

1977

ACS Symposium Series

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“…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].…”

Section: Xenonmentioning

confidence: 98%

The vaporization properties of krypton and xenon

Ferreira

Lobo

2009

The Journal of Chemical Thermodynamics

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“…Examples are n-pentane + nitrobenzene 53 which has a negative value of (dT c /dp) and carbon dioxide + n-octane 54 , H-n-decane 55 , The second type of diagram, Figure 6.72(b), is less common but occurs for a few aqueous mixtures such as water + phenol 53,57 and water + 2butanone 58 . Another simple mixture in this category is xenon + hydrogen chloride 60 where the existence of the positive azeotrope is well established at temperatures above 159K and, judging by the shape of the isotherms at that temperature, a UCST is expected to form at slightly lower temperatures. The simple mixture carbon dioxide + ethane 59 is almost certainly in this category for it forms a positive azeotrope and, by comparison with other carbon dioxide + n-alkane mixtures, would exhibit a UCST at low temperatures but for the formation of the solid phase of carbon dioxide which intervenes before the UCST is reached.…”

Section: Highmentioning

confidence: 99%

Fluid mixtures at high pressures

Rowlinson

1982

Liquids and Liquid Mixtures

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Thermodynamics of liquid mixtures of xenon and hydrogen chloride

Cited by 40 publications

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Polar and Quadrupolar Fluid Mixtures

Polar and Quadrupolar Fluid Mixtures

The vaporization properties of krypton and xenon

Fluid mixtures at high pressures

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