Understanding the high-temperature behavior of nitrogen oxides is essential for controlling pollution generated in automobile engines. The decomposition of nitric oxide (NO)(NO) to N2N2 and O2O2 is second order with a rate constant of 0.0796 M−1⋅s−1M−1⋅s−1 at 737∘C∘C and 0.0815 M−1⋅s−1M−1⋅s−1 at 947∘C∘C.