Abstract
Selected thermophysical properties of polar, dense supercritical fluids are discussed. The static dielectric constant of water and the freon R22 (CHClF 2) is shown in some detail. Examples of critical curves for binary systems with water and methanol are given. New experimental data of excess volumes up to 400 °C and 2000 bar are shown for water combined with H 2, CH 4 and benzene. Excess Gibbs energies and activity coefficients for water-benzene are also shown. Results of the solubility of anthracene in ten different high pressure fluids, obtained by UV-spectroscopy, are presented. The PVT-data of concentrated supercritical aqueous NaCl-solutions and the ion product of pure water to 1000 °C are discussed.
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