Given the following information: N₂ bond energy = 941 kJ/mol
F₂ bond energy = 154 kJ/mol calculate the N-F bond energy.

Question

Given the following information: N₂ bond energy = 941 kJ/mol F₂ bond energy = 154 kJ/mol calculate the N-F bond energy.

Quizplus · Accepted Answer

To find the N-F bond energy, we need to use Hess's Law and subtract the bond energy of the N₂ bond from the bond energy of the F₂ bond. This is because we can imagine breaking the N₂ bond into N + ₂ and forming the N-F bond from N + F, and these two processes should add up to the overall reaction of N₂ + F --> F₂ + N. Thus, N-F bond energy = F₂ bond energy - N₂ bond energy N-F bond energy = 154 kJ/mol - 941 kJ/mol N-F bond energy = -787 kJ/mol However, bond energies are typically listed as positive values, so we need to flip the sign to get the final answer: N-F bond energy = 787 kJ/mol None of the given answer choices match this answer, but we can see that the closest one is B, which is 268 kJ/mol. This is clearly not correct, so the answer is E, none of these.

Given the Following Information: N2 Bond Energy = 941 KJ/mol

Given the Following Information: N₂ Bond Energy = 941 KJ/mol