SHOCK-TUBE STUDY OF THE RATE COEFFICIENT OF H-2-]OH+O(O)

The H+O-2-->OH+O reaction was reexamined by monitoring OH radical conc entrations using cw UV laser absorption spectroscopy in H-2-O-2-Ar tes t gas heated by 1850-3550 K shock waves. The rate coefficient expressi on (1.0+/-0.1)X10(14) X exp(-7690+/-250 K/T) cm(3) mol(-1) s(-1) was d erived. Fitting the present data together with those of Shin and Micha el [J. Chem. Phys. 95 (1991) 262] gave k(4),=(7.6+/-0.7)X10(13) exp(-7 065+/-140 K/T) cm(3) mol(-1) s(-1) for the temperature range 1100-3550 K. The reverse reaction rate coefficient was found to be (9.3+/-0.8)X 10(12) cm(3) mol(-1) s(-1) independent of temperature from 1850 to 355 0 K.