Finally to demonstrate the effect of these differences on quantities of interest, Fig. , shows a comparison of the equilibrium mole fractions of a pure carbon vapor considering the 3 cases. The plots are shown in both log and linear scale. As the temperature increases, the differences between the compositions become more visible. For C 4 , the differences in the thermodynamic properties are more important at higher temperatures, however, the mole fractions of C 4 in a pure carbon vapor decline quickly above 5000K. Therefore, the differences in the mole fractions are not very significant.