Finally, we look at the equilibrium composition for pure carbon mixtures and perform two comparisons of the results obtained. The first is with an experimental result from Gingerich et al. In the paper by Gingerich et al., 7 the heats of formation of linear carbon clusters were determined using high-temperature Knudsen effusion mass spectrometric method. Table shows a comparison of the heats of formation of the current work and Ref. 7. As can be seen, although the heats of for-mation from theoretical predictions are close to the experimental results, the experimental results have large uncertainties which lead to significant differences in the mole fractions of the species, Fig. . It should be noted here that the equilibrium calculation for both cases are computed using PLATO. We obtain different compositions as a result of using the corresponding heats of formation from our calculations and Ref. 7.