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# One gram of diamond atom of graphite and one gram atom of diamond were separately burnt to carbon dioxide. The amount of heat liberated were 393.5 kJ and 395.4 kJ respectively. It follows that

(a) graphite has greater affinity for oxygen
(b) diamond has greater affinity for oxygen
(c) graphite is more stable than diamond
(d) diamond is more stable than graphite

Answer: graphite is more stable than diamond
Since graphite on combustion gives less heat, it means graphite has less heat content and is more stable.