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Adsorption and heat of adsorption of n-pentane and of n-hexane on barium sulfate

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Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Summary

  1. 1.

    Using a calorimeter with a constant heat exchange, we measured the heats and the isotherms of the adsorption of n-pentane and n-hexane vapors on barium sulfate. The differential heat of adsorption of the hydrocarbon vapors shows little change up to where half of the surface is filled, and then it gradually decreases with increase in the degree of filling, due to the heterogeneity of the crystallographic faces forming the surface of the barium sulfate crystals.

  2. 2.

    The standard thermodynamic characteristics of the adsorption of n-pentane and n-hexane on barium sulfate were determined, as well as the values of the areas occupied by these molecules in a dense monolayer. The entropy curves testify to the substantial reduction in the mobility of the n-alkane molecules in the adsorption layer on barium sulfate when compared with their mobility in a normal liquid.

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Authors and Affiliations

  1. Institute of Physical Chemistry, Academy of Sciences of the USSR, USSR

    N. N. Avgul, G. I. Berezin, A. V. Kiselev & I. A. Lygina

Authors
  1. N. N. Avgul
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  2. G. I. Berezin
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  3. A. V. Kiselev
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  4. I. A. Lygina
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Avgul, N.N., Berezin, G.I., Kiselev, A.V. et al. Adsorption and heat of adsorption of n-pentane and of n-hexane on barium sulfate. Russ Chem Bull 9, 1817–1821 (1960). https://doi.org/10.1007/BF00907737

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  • DOI: https://doi.org/10.1007/BF00907737

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