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Coexistence curve equation for several onecomponent fluids in the vicinity of the critical point

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Abstract

Based on the available literature data on (he temperature dependence of coexisting densities near the critical point for Ne, HD, N2, and C2,H4,. the disadvantages of using the extended scaling equation of the coexistence curve with the Ising exponent are shown, Combined statistical methods are proposed to reanalyze these data. For all the above-mentioned substances, in (he range of reduced temperature 1.3 x 10-4 < r < 6 x 10-3 to 2 x 10-2, we obtain for the order parameter a single-term fit, with the common value β=0.355. The fit describes the experimental densities with .m uncertainty ol 0,06 to 0.1%.

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Authors and Affiliations

  1. Physics Department, Kiev Taras Shevchenko University, pr. Glushkova 6, 252022, Kiev, Ukraine

    E. T. Shimanskaya, Yu. I. Shimansky & A. V. Oleinikova

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  1. E. T. Shimanskaya
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  2. Yu. I. Shimansky
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  3. A. V. Oleinikova
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Shimanskaya, E.T., Shimansky, Y.I. & Oleinikova, A.V. Coexistence curve equation for several onecomponent fluids in the vicinity of the critical point. Int J Thermophys 17, 641–649 (1996). https://doi.org/10.1007/BF01441510

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