Letter | Published:

Dissociation Energy of the CO Molecule and the Sublimation Heat of Carbon


THE direct experimental values of the sublimation heat L of carbon obtained by several authors1 lie between 139 and 177 kcal. An accurate value can be deduced from the energy of dissociation DCO of CO into normal atoms, since the well-known relations (at 0°K.): lead to L = DCO 86.3 ± 0.2 kcal. (86.3 kcal. = 3.74 v.e.)(1)

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  1. 1

    H. Kohn and M. Guckel, Z. Phys., 27, 305 ; 1924. A. L. Marshall, and F. J. Norton, J. Amer. Chem. Soc., 55, 431 ; 1933.

  2. 2

    D. Coster and F. Brons, Physica, 1, 155 ; 1, 634 ; 1934. D. N. Read, Phys. Rev., 45, 752 ; 1934. R. Schmid and L. Gerö, Z. Phys., 93, 656 ; 1935.

  3. 3

    L. Pauling and J. Sherman, J. Chem. Phys., 1, 606 ; 1933. C. T. Zahn, J. Chem. Phys., 2, 671 ; 1934. W. Lasareff, J. Phys. Chem. (in the press) and Physica (in the press). P. Goldfinger, W. Lasareff and M. Letort, C.R., 200, 1593; 1935.

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