Question

All combination reaction are exothermic reaction.Justify with the suitable chemical reaction?​

Answer 1

C +O2 = CO2 + energy(kcal)

Answer 2

No. Even though most of the combination reactions are exothermic in nature but some of the combination reactions are endothermic in nature. Ex: The formation reaction benzene from acetylene is endothermic.

3C₂H₂ + heat→ C₆H₆

(ii). Formation of nitrous oxide from Nitrogen and Oxygen

N2 (g) + O2 (g) + heat → 2NO (g)

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