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 D_CO of CO into normal atoms, since the well-known relations (at 0°K.) : lead to L = D_CO - 86.3 +/- 0.2 kcal. (86.3 kcal. = 3.74 v.e.)(1)