摘要:6.已知H2(g)+Br2,1gH2完全反应放出热量是36KJ ,已知H2(g)的键能是436KJ/mol.HBr(g)的键能是369KJ/mol,则Br2 A.404 KJ/mol B.260 KJ/mol C.230 KJ/mol D.200 KJ/mol

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