Letter | Published:

Second Virial Coefficient of Methyl Chloride Vapour

Abstract

THEORETICAL considerations, for example, those of Hirschfelder1, indicate that the virial coefficients higher than the second cannot be large enough to produce, in the isotherms of vapours at reduced temperatures near 0.70, sufficient curvature to be detectable with the experimental techniques available at present. Nevertheless, there are several statements of curved isotherms in the literature. As pointed out previously2,3, the greatest care is required if errors due to adsorption are to be avoided.

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References

  1. 1

    Hirschfelder, J. O., Curtiss, C. F., and Bird, R. B., “Molecular Theory of Gases and Liquids” (John Wiley and Sons, Inc., New York, 1954).

  2. 2

    Whytlaw-Gray, R., and Bottomley, G. A., Nature, 180, 1252 (1957).

  3. 3

    Bottomley, G. A., and Reeves, C. G., Trans. Farad. Soc., 53, 1455 (1957).

  4. 4

    Hamann, S. D., and Pearse, J. F., Trans. Farad. Soc., 48, 101 (1952).

  5. 5

    Reeves, C. G., and Whytlaw-Gray, R., Proc. Roy. Soc., A, 232, 173 (1955).

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