To oxidize a diamond, the covalent bonds must be broken, which occurs when diamond is heated in the presence of air. At 150 degrees Celsius, diamond can oxidize to carbon dioxide (CO2), but the activation energy required for this reaction is 220 kJ/mol. Calculations using the Arrhenius equation indicate that at 140 degrees Celsius, the reaction would take an impractically long time—approximately 480 million years—before any noticeable effects occur. Therefore, heating a diamond at this temperature is insufficient for oxidation to take place within a reasonable timeframe. The discussion highlights the significant energy barrier for diamond oxidation and the long duration required for any observable reaction at lower temperatures.
