已知H—H键能为436 kJ·mol-1,N—H键能为391 kJ·mol-1,根据化学方程式:N2(g)+

已知H—H键能为436 kJ·mol^-1,N—H键能为391 kJ·mol^-1,根据化学方程式:N₂(g)+3H₂(g)2NH₃(g)　ΔH=-92.4 kJ·mol^-1,则N≡N键的键能是(　　 )

A.431 kJ·mol^-1 B.946 kJ·mol^-1C.649 kJ·mol^-1 D.896 kJ·mol^-1

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已知H—H键能为436 kJ·mol-1,N—H键能为391 kJ·mol-1,根据化学方程式:N2(g)+

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