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Abstract The reaction of NO with O 2 has been investigated in aqueous solution. As demonstrated by ion chromatography, the sole product is NO 2 − . Kinetic studies of the reaction by stopped‐flow methods with absorbance and conductivity detection are in agreement that the rate law is ‐dO 2 /d t = k NO 2 O 2 with k = 2.1 × 10 6 M −2 s −1 at 25°C. This rate law is unaffected by pH over the range from pH 1 to 13, and it holds with either NO or O 2 in excess. By studying the reaction over the temperature range from 10 to 40°C, the following activation parameters were obtained: Δ H ≠ = 4.6 ± 2.1 kJ mol −1 and Δ S ≠ =−96 plusmn; 4 J K −1 mol −1 . © 1993 John Wiley & Sons, Inc.
Awad et al. (Sat,) studied this question.