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Properties of Perfluorobenzene near the Critical Point

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The density of vapor and liquid perfluorobenzene along the liquid–vapor coexistence curve has been studied by a gamma-ray attenuation technique over the temperature range from 299 to 517 K. According to measurements, the coordinates of the critical point are TC = 516.66 ± 0.05 K and ρ C = 550.5 ± 2 kg · m−3. The critical exponent β of the coexistence curve equals 0.343 ± 0.005, which agrees closely with the non-classical value. The results of our measurements were compared with data available in the literature. The height dependence of the density of a two-phase sample was investigated in relation to the temperature and time. These experiments made it possible to determine the isothermal compressibility of liquid and vapor phases near the critical point.

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Authors and Affiliations

  1. Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Lavrentyev Ave. 1, Novosibirsk, 630090, Russia

    S. V. Stankus & R. A. Khairulin

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  1. S. V. Stankus
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  2. R. A. Khairulin
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Correspondence to S. V. Stankus.

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Stankus, S.V., Khairulin, R.A. Properties of Perfluorobenzene near the Critical Point. Int J Thermophys 27, 1110–1122 (2006). https://doi.org/10.1007/s10765-006-0092-8

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