Phase diagram of argon: The prediction of the coexisting liquid and vapor densities of argon near the critical point
Laboratoire de synthèse et biocatalyse organique, Département de Chimie, Faculté des Sciences, Université Badji Mokhtar, B. P. 12, Sidi-Amar, Annaba (23200), Algeria
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Received: 10 July 2016
Revised: 19 August 2016
Published online: 18 April 2017
This work reports on the prediction of the liquid-vapor densities as well as the rectilinear diameter of argon in the vicinity of the critical region. A previously formulated equation of state (EOS) [A. Rizi, A. Abbaci, J. Mol. Liq. 171, 64 (2012)] based on the Landau-Ginzburg crossover formalism for argon is used for this purpose. We thus present a comparison of the crossover model equation of argon with the experimental phase equilibrium data and describe the singularity of the rectilinear diameter very close to the critical point. The obtained results show that percent deviations between the experimental data and the calculated rectilinear diameter from the crossover model do not exceed 0.05%.
© EDP Sciences, Springer-Verlag, 2017