The results for a typical combustion experiment for 3,5-di-tert-butyl-o-benzoquinone and 3,6-di-tert-butyl-o-benzoquinone are listed in tables 3 and 4. The combustion was complete in all the
experiments. The specific energies of combustion of the examined benzoquinones were referred to the final temperature T = 298.15 K. The standard massic energies of combustion were taken as the mean of the values determined from six experiments which were performed for both compounds. The errors were presented as the standard deviation from the mean.