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- W68106949 abstract "In view of its ability to form visible colored mixtures with gases, iodine was chosen for studying molecular diffusion in CO/sub 2/ near the critical point. The method used was based on the work of R. Furth (J. Sci. Instr. 22, 6l (1945)) on the determination of diffusion coefficients in colored liquids. The measurement was based on the determination of the time required for a given gas volume at a certain distance to reach a coloration identical with that of the reference, calculating the coefficient of diftusion from the formula D = (l/sup 2/ /2t) where 1 = distance and t = time. The lowest value that can be determined with the method is 1 x 10/sup -7/ cm/sup 2/ sec/sup -1/. The diffusion coefficient of I in liquid CO/sub 2/ was found to be l.5 x 10/sub -5/ cm/sup 2/ sec/sup -1/ which agrees with previous data. Measurements in the gas phase were carried out at 31.5 deg C at densities below and above the critical value. Results indicate a complete absence of diffusion near the critical point, while under conditions further removed the diffusion rate was found to be same as for compressed gases in general. This confirmsmore » previous conclusions that at the critical point the Brownian movement ceases, resulting in stoppage of the diffusion phenomenon. (TTT)« less" @default.
- W68106949 created "2016-06-24" @default.
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- W68106949 date "1961-11-11" @default.
- W68106949 modified "2023-09-27" @default.
- W68106949 title "DIFFUSION OF IODINE IN COMPRESSED CARBON DIOXIDE NEAR ITS CRITICAL POINT" @default.
- W68106949 hasPublicationYear "1961" @default.
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