Modified Leung-Griffiths equation for describing the thermodynamic properties of a CO2-Ne solution near the critical point of CO2 vaporization

Kukarin, V. F.; Kuskova, N. V.; Martynets, V. G.; Matizen, É. V.; Sartakov, A.G.

doi:10.1007/bf00871412

Cited by 2 publications

(2 citation statements)

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“…To test the validity of Eq. (10) for interpolation of P ρT data in the close vicinity of the critical point, we used data for water [14,15], nitrogen [16], and carbon dioxide [17]. The values of the critical exponents for all the substances were taken to be equal to their values in the three-dimensional Ising model: γ = 1.239, δ = 4.80 [18].…”

Section: Testing the Equation Of Statementioning

confidence: 99%

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Asymmetry of the vapor–liquid coexistence curve: The asymptotic behavior of the "diameter"

Sushko

Babiy

2011

Journal of Molecular Liquids

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We analyze, without resort to any model field-mixing scheme, the leading temperature-dependent term in the 'diameter' of the coexistence curve asymptotically close to the vapor-liquid critical point. For this purpose, we use a simple non-parametric equation of state which we develop by meeting several general requirements. Namely, we require that the desired equation (1) lead to correct asymptotic behavior for a limited number of the fluid's parameters along selected thermodynamic paths, (2) reveal a Van der Waals loop below the critical point, and (3) be consistent with a rigorous definition of the isothermal compressibility in the critical region. For the temperature interval in question, the proposed equation approximates experimental data with an accuracy comparable to those given by Schofield's parametric equation and by other authors' equations. The desired term is obtained by applying the Maxwell rule to the equation and can be represented as D 2β |τ | 2β , where |τ | = |T − Tc|/Tc and β is the critical exponent for the order parameter. The amplitude D 2β is determined explicitly for the volume-temperature and entropy-temperature planes.

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Section: Testing the Equation Of Statementioning

confidence: 99%

“…The critical amplitudes were calculated by using the values of the parameter z = P c V c /RT c and approximation formulas [19]. The parameters of the critical points were taken from the original works [14][15][16][17].…”

Section: Testing the Equation Of Statementioning

confidence: 99%