6. Consider the following reaction:
A2 + B2 2AB ∆H = -365 kJ
The bond energy for A2 is half the amount of AB. The bond energy of B2 = 447 kJ/mol. What is the bond
energy of A2?
(A) 812 kJ/mol；
(B) 630 kJ/mol；
(C) 271 kJ/mol；
(D) –183 kJ/mol；
(E) none of these
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