Hydroxyl Radical Kinetics by Kinetic Spectroscopy. V. Reactions with H2 and CO in the Range 300–500°K

The reactions of OH with H₂ and CO were studied by the flash‐photolysis–kinetic‐spectroscopy technique over the temperature range 300–500°K. At both ends of this range it was verified that the reactions are first order in [OH] and [H₂] or [CO]. The Arrhenius parameters and their 95% confidence limits, as determined from least‐squares fits of the data, follow: For H₂+OH→H+H₂O, $\text{E\hspace{0.17em}=\hspace{0.17em}4020\hspace{0.17em}±\hspace{0.17em}180}\mathrm{cal}/\mathrm{mole}$ and $\log \mathrm{A\; (}\mathrm{cc}/\mathrm{mole}·\sec \text{)\hspace{0.17em}=\hspace{0.17em}12.61\hspace{0.17em}±\hspace{0.17em}0.10}$ ; for CO+OH→CO₂+H, $\text{E\hspace{0.17em}=\hspace{0.17em}230\hspace{0.17em}±\hspace{0.17em}140}$ and $\log \text{A\hspace{0.17em}=\hspace{0.17em}11.10\hspace{0.17em}±\hspace{0.17em}0.07}$ .