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- W2065765830 abstract "Measurements have been made on the adsorption on charcoal of D2 and H2 in the temperature regions 90-55°K and 20-17°K. Between 90-55°K the adsorption of D2 is found to be about 8% greater than that of H2. Between 20-17°K this difference has increased to about 15%. It seems to us that this difference must be explained by a difference in potential and kinetic properties between the two isotopes (a difference in diameter being out of the question) and that the way to treat this problem is analogeous to that developed by K. Schäfer, when dealing with the van der Waals' attraction. (Z. phys. Chem., B. 36, 98, 1937). Between 90-55°K the adsorption isotherms can be represented by a Freundlich equation, between 20-17°K by a Williams equation. The results obtained cannot be brought into agreement with the potential theory of Polanyi. From the data obtained for the adsorption isotherms the heat of adsorption was calculated at various temperatures as a function of the adsorbed quantity. From this it can be concluded that there is a constant difference between the heat of adsorption of D2 and of H2 the adsorption heat of D2 being higher than that of H2 (about 180 cal.). The measurements of the adsorption were extended as far as capillary condensation, enabling us to derive the structure curve of the charcoal from which, the surface tension of D2 was, finally, computed. In this way we found: 20,36°K, 0.81 dyn/cm; 19.05°, 1.11; 17.48°, 1.70." @default.
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- W2065765830 date "1939-01-01" @default.
- W2065765830 modified "2023-10-18" @default.
- W2065765830 title "Measurements on the adsorption of light and heavy hydrogen on charcoal between 90°K and 17°K" @default.
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- W2065765830 doi "https://doi.org/10.1016/s0031-8914(39)90321-6" @default.
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