Summary
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1.
The adsorption isotherms and the differential heats of adsorption of the vapors of water, methanol, ethanol, n-propanol, and n-butanol on graphitized channel carbon black have been determined; the heat of adsorption of water vapor is much less than the heat of condensation, and the heats of adsorption of the alcohols increase with increase in the length of the carbon chain.
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2.
The values of the heats of adsorption and the areas corresponding to a molecule of the alcohols in the compact monolayer on the surface of graphitized carbon black indicate that the alcohol molecules are arranged parallel to the surface and form hydrogen bonds with one another.
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3.
The standard thermodynamic characteristics of the adsorption of n-alcohols on graphitized channel black have been determined and it has been shown that the state of a substance in the adsorption layer in these cases is close to the associated state in the liquid.
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4.
On going from adsorption on graphitized carbon black to adsorption on the original (oxidized) carbon black, and more particularly to adsorption on silica gel with a hydrated surface, there is a sharp increase in the localization of methanol molecules.
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The authors wish to thank P. A. Tesner for providing the highly-dispersed thermal black and K. D. Scherbakova and V. L. Foss for providing the purified reagents.
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Avgul', N.N., Berezin, G.I., Kiselev, A.V. et al. The adsorption and heat of adsorption of normal alcohols on graphitized carbon black. Russ Chem Bull 10, 186–193 (1961). https://doi.org/10.1007/BF00919549
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DOI: https://doi.org/10.1007/BF00919549