Describe the reaction of Diborane ( $$B_2H_6$$ ) with air. Is it endothermic or exothermic?

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Describe the reaction of Diborane ( $$B_2H_6$$  ) with air. Is it endothermic or exothermic?

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Diborane catches fire spontaneously in air. The reaction is highly exothermic, releasing a large amount of energy.   Reaction:  $$B_2H_6 + 3O_2 ightarrow B_2O_3 + 3H_2O$$   ( $$\Delta_c H^\circ = -1976 	ext{ kJ mol}^{-1}$$  )

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