H2(g) + F2(g) → 2 HF(g) ΔH=-546 kJ
According to the Law of Conservation of Energy, what does this equation tell us about the change in energy?
A) It took 546 kJ of energy to form HF.
B) 546 kJ of energy were added to the system in order for the reaction to proceed.
C) More energy was required to break the bonds of H2 and F2 than was released in the formation of 2 HF bonds.
D) More energy was released in the formation of the 2 HF bonds than in the breaking of the bonds of H2 and F2.

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