Summary
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1.
Measurements have been made of the adsorption isotherms and differential heat of adsorption of neopentane and carbon tetrachloride on thermal black graphitized at 3000°.
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2.
The large sphere-like molecules of these substances are adsorbed in a predominantly nonlocalized way, and interact strongly with one another, which causes a marked increase in the heat of adsorption as the monolayer is being filled and a strongly concave initial portion of the adsorption isotherm.
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3.
Free rotations or rotational oscillations of these molecules are possible in the adsorbed layer with small amounts of surface filling.
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4.
A discussion is given of different possible ways of defining the standard state of the adsorbed layer on a homogeneous surface, and values are given for the corresponding thermodynamic quantities of the adsorptive systems studied.
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The authors express their gratitude to Z. S. Kraits for furnishing the purified carbon tetrachloride.
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Avgul', N.N., Kiselev, A.V., Lygina, I.A. et al. Isotherms and heats of adsorption of neopentane and carbon tetra chloride vapor on graphitized carbon black. Russ Chem Bull 11, 717–723 (1962). https://doi.org/10.1007/BF00905289
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DOI: https://doi.org/10.1007/BF00905289