Given the equations listed below and their corresponding enthalpies:
N₂O₄ (g) →2 NO₂ (g) D H = 58 kJ 2 NO (g) + O₂ (g) →2 NO₂ (g) D H = - 112 kJ What is D H for the following reaction?
2 NO (g) + O₂ (g) →N₂O₄ (g)

Question

Quizplus · Accepted Answer

The enthalpy change for the reaction 2 NO (g) + O2 (g) → N2O4 (g) can be determined using Hess's law:N2O4 (g) → 2 NO2 (g) ΔH = 58 kJ2 NO (g) + O2 (g) → 2 NO2 (g) ΔH = -112 kJ--------------------------------------------------2 NO (g) + O2 (g) → N2O4 (g) ΔH = -54 kJTherefore, the correct answer is A: -54 kJ.

Given the Equations Listed Below and Their Corresponding Enthalpies