Temperature dependence of the absolute rate constant for the reaction of hydroxyl radical with hydrogen sulfide. [228/sup 0/K, 298/sup 0/K, 437/sup 0/K]

Absolute rate constants for the reaction of hydroxyl radical with hydrogen sulfide were measured at 228, 298, and 437 K by using the flash photolysis-resonance fluorescence method. Hydroxyl radicals were produced by the photolysis of water, and resonance fluorescence from OH were measured by multiscaling techniques. The results at 228, 298, and 437 K were found to be (5.11 +/- 0.39) X 10/sup -12/, (4.42 +/- 0.36) X 10/sup -12/, and (5.57 +/- 0.48) X 10/sup -12/, respectively, all in units of cm/sup 3/ molecule/sup -1/ s/sup -1/. The average value measured was (5.01 +/- 0.55) X 10/sup -12/ cm/sup 3/ molecule/sup -1/ s/sup -1/, where the uncertainty cited is one standard deviation. The results are discussed theoretically and compared to previous determinations.