Thermal rate constants over thirty orders of magnitude for the I+H2 reaction

被引:15
作者
Michael, JV
Kumaran, S
Su, MC
Lim, KP
机构
[1] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA
[2] Butler Univ, Dept Chem, Indianapolis, IN 46208 USA
关键词
D O I
10.1016/S0009-2614(00)00072-5
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
I-atom atomic resonance absorption spectrometry has been used to measure thermal rate constants for the I + H-2 --> HI + H reaction between 1755 and 2605 K in reflected shock waves. Measured rate constants can then be expressed by k(1) = (3.92 +/- 1.15) X 10(-9) exp(-21 398 +/- 658 K/T) cm(3) molecule(-1) s(-1). Combining these results with earlier values, the rate behavior over the combined temperature range, 230 K less than or equal to T less than or equal to 2605 K, is: k(1) = (4.52 +/- 0.34) X 10(-10) exp(-17 070 +/- 34 K/T) cm(3) molecule(-1) s(-1). This result holds over similar to 30 orders of magnitude and is discussed in terms of bimolecular rate theory. (C) 2000 Elsevier Science B.V. All rights reserved.
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页码:99 / 106
页数:8
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