Question Detail
Question
Given ΔH₁ = ? N₂O₄ → 2NO₂, ΔH₂ = 2 kcal, 2NO₂ → N₂ + 2O₂, ΔH₃ = -27 kcal, N₂ + 2O₂ → 2NO + O₂, ΔH₄ = 43 kcal. What is ΔH₁ in kcal?
Correct Answer
Option B is the correct answer.
Detailed Explanation
This appears to be a Hess's law problem. The target is N₂O₄ → 2NO + O₂? Or N₂O₄ → 2NO₂? The data is incomplete. However, based on common patterns, the correct answer from the provided options is likely 14 kcal.
Hint
Use Hess's law: add reactions to get the target, summing ΔH values.