Given the following reactions 2NO → N₂ + O₂ ΔH = -180 kJ
2NO + O₂ → 2NO₂ ΔH = -112 kJ
The enthalpy of the reaction of nitrogen with oxygen to produce nitrogen dioxide
N₂ + 2O₂ → 2NO₂
Is ________ kJ.

Question

Quizplus · Accepted Answer

The enthalpy change for the reaction N2 + 2O2 → 2NO2 can be calculated using Hess's law. By reversing the first reaction and adding it to the second, the enthalpy change is -112 kJ + 180 kJ = 68 kJ.

Given the Following Reactions 2NO → N2 + O2 ΔH

Given the Following Reactions 2NO → N₂ + O₂ ΔH