The vapour pressure of argon

Clark, Angela; Din, Fasih Ud; Robb, J. D.; Michels, A.; Wassenaar, Trudy M.; Zwietering, Th.N.

doi:10.1016/0031-8914(51)90041-9

Cited by 69 publications

(22 citation statements)

References 7 publications

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“…The symbols are experimental. For argon: , reference [22]; Ç, reference [12]; j, reference [23]; M, reference [7]; +, reference [24]; h, reference [25]; ., reference [8]. For krypton: e, reference [26]; , reference [27]; d, reference [14]; j, reference [23]; N, reference [28]; h, reference [29]; +, reference [24]; ., reference [8].…”

Section: Resultsmentioning

confidence: 99%

The sublimation of argon, krypton, and xenon

Ferreira

Lobo

2008

The Journal of Chemical Thermodynamics

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Section: Resultsmentioning

confidence: 99%

The sublimation of argon, krypton, and xenon

Ferreira

Lobo

2008

The Journal of Chemical Thermodynamics

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“…In our work A 0 and P0 are calculated for fluids from the equation of state developed by Tildesley and Streett [6] for hard-dumbbell fluids (which for hard spheres reduces to the Carnahan-Starling [7] equation of state), and for solids from Monte Carlo simulation results [2] and the cell theory [4] obtained recently for hard dumbbells. We should point out that although to our knowledge this is the first application of Downloaded by [New York University] at 20:45 07 January 2015 data as compared with experiment [26]. A is defined as apep/kT.…”

Section: Generalized Van Der Waals Theorymentioning

confidence: 98%

A generalized van der Waals theory of solid-fluid equilibria for non-spherical molecules

1993

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By making use of recently obtained theoretical and Monte Carlo simulation results for solid state thermodynamics and solid-fluid equilibria for systems of hard dumbbells a generalized van der Waals theory of solid-fluid equilibria has been formulated. The theory predicts how the temperature dependence of the solid-liquid (and vapour-liquid) equilibrium is influenced by non-spherical molecular shape for diatomic molecules. Two regimes of behaviour are identified, depending on whether the underlying hard dumbbell reference system freezes into a plastic crystal or an orientationally ordered crystal. The theory correctly predicts a decrease in the triple point temperature and density change on freezing between spherical molecules, such as argon, and slightly non-spherical molecules which freeze into plastic crystal phases such as nitrogen. An extension of the theory which includes a simplified treatment of the influence of quadrupolar interactions provides a plausible explanation for the relatively high reduced triple point temperature of carbon dioxide.

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“…The triple point obtained together with those determined by other investigators (Chien 1967;Clark et al 1951 ;Clusius 1936;Clusius and Weigand 1940;Flubacher et al 1961 ;Frank and Clusius 1939;Freeman and Halsey 1956;Heastie 1959;Lovejoy 1963;Michels et al 1957;Streett and Staveley 1969) are listed in Table 5. As one In his paper, salter (1963) suggested that the correction term p(Vc -B') due to gas imperfection and the finite volume of the atom in the solid phase could be neglected since its omission would introduce a smaller error in the determination of the static lattice energy E, than the exp(-g,/kT) term due to vacancy formation.…”

Section: (B) Triple Pointmentioning

confidence: 98%

On the Vapor Pressure of Solid Argon

Chen¹,

Aziz²,

Lim³

1971

Can. J. Phys.

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The vapor pressure of solid argon was measured by a precision apparatus with a standard error of ,0.023 Torr in the temperature range from 75.0 to 83.8 K, and that of liquid argon to the same precision from 83.8 to 85.2 K. The data were used to determine the coefficients A and B of the two parameter vapor pressure equation, l o g l o p = A f (BIT), and to locate the triple point of argon by an extrapolation method. The results are in good agreement with those of other workers. The static lattice energy E, of the solid and geometrical mean frequency o, of the vibrational spectrum, corrected for the presence of lattice vacancies, gas imperfection, and finite crystal volume, were also determined from the data. When determined over successive small temperature intervals, E, is found to increase as the temperature increases, as expected. The magnitude of E, agrees with the value obtained from a lattice-sum calculation on the basis of a Lemard-Jones (6-12) potential to within f 0.17%.On a mesure la pression de vapeur de I'argon solide avec unappareil de precision ayant un kcart type de f 0.023 Torr. L'intervalle de temperature s'etendait de 75.0 a 83.8 K pour I'argon solide et de 83.8 a 85.2 K pour I'argon liquide. Les resultats obtenus ont ete utilisks pour determiner les coefficients A et B de I'equation deux parametres de la pression de vapeur (log,, p = A f (BIT)) et pour determiner le point triple de I'argon par une methode d'extrapolation. Les resultats sont en bon accord avec ceux d'autres chercheurs. On a aussi obtenu, a partir de ces mesures, I'energie statique du reseau solide Eo et la moyenne geometrique o, du spectre des frkquences de vibration, en corrigeant pour les vacances dans le reseau, les imperfections de gaz et le volume fini du cristal. Les valeurs de E, obtenues pour de petits intervalles successifs de temperature augmentent comme prevu en fonction de la temperature. La grandeur de E, est en accord, ii mieux que + 0.17%, avec la valeur obtenue a partir d'un calcul de somme de reseau bas6 sur un potentiel de Lennard-Jones. Introductionlattice vibrational spectrum. An attempt was also The vapor pressure of solid argon has been measured by many investigators over the past seventy years. The data have been used to determine such properties of argon as the latent heat, the static lattice energy, and the geometrical mean frequency of the lattice vibrational spectrum. However, these results are observed to vary from one investigator to another. To determine more accurate values of the physical quantities mentioned above, a copious number of accurate data points is required. This is especially true if one wishes to detect the variation of static lattice energy with temperature. To this end a precision vapor pressure assembly was constructed in the form of a modified adiabatic calorimeter.The experimental data were first fitted to the traditional empirical vapor pressure equation and were then compared with those of others. The data were also used to determine the triple point of argon by an extrapolation...

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The vapour pressure of argon

Cited by 69 publications

References 7 publications

The sublimation of argon, krypton, and xenon

The sublimation of argon, krypton, and xenon

A generalized van der Waals theory of solid-fluid equilibria for non-spherical molecules

On the Vapor Pressure of Solid Argon

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