CaltechAUTHORS
  A Caltech Library Service

Pressure and temperature dependence kinetics study of the NO + BrO → NO_2 + Br reaction. Implications for stratospheric bromine photochemistry

Watson, R. T. and Sander, S. P. and Yung, Y. L. (1979) Pressure and temperature dependence kinetics study of the NO + BrO → NO_2 + Br reaction. Implications for stratospheric bromine photochemistry. Journal of Physical Chemistry, 83 (23). pp. 2936-2944. ISSN 0022-3654. https://resolver.caltech.edu/CaltechAUTHORS:20140924-094540365

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20140924-094540365

Abstract

The flash photolysis-ultraviolet absorption technique has been utilized to study the reactivity of nitric oxide with BrO radicals over a wide range of pressure (100-700 torr) and temperature (224-398 K). Pseudo-first-order conditions were used in order to minimize complications caused by secondary kinetic processes. The reaction and its corresponding Arrhenius expression in units of cm^3 molecule^(-1) s^(-1) can be written NO + BrO → NO_2 + Br ΔHº_298 = -17.0 kcal mol^(-1) k_1 = (1.28 ± 0.23) x 10^(-11)exp((181 ± 46)/T) (T = 224-398 K) The results are compared with previous measurements, and atmospheric implications of the reaction are discussed. It is shown that this reaction is important in controlling the ratios [BrO]/[Br] and [BrO]/[HBr] in the stratosphere but that it does not affect the catalytic efficiency of BrO, in ozone destruction.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://pubs.acs.org/doi/abs/10.1021/j100486a002PublisherArticle
http://dx.doi.org/10.1021/j100486a002DOIArticle
ORCID:
AuthorORCID
Sander, S. P.0000-0003-1424-3620
Yung, Y. L.0000-0002-4263-2562
Additional Information:© 1979 American Chemical Society. Received May 21, 1979. We thank J. Linke for his indispensable glass blowing services, G. Tennant and M. Patapoff for their expert assistance in constructing the experimental apparatus, and J. Pinto for use of the output of our one dimensional photochemical model prior to publication. We benefited greatly from discussions with W. B. DeMore. This paper presents the results of one phase of research carried out at the Jet Propulsion Laboratory, California Institute of Technology, under Contract No. NAS7-100, sponsored by the National Aeronautics and Space Administration. Part of this work was supported by NASA Grant NSG 2229 to the California Institute of Technology.
Funders:
Funding AgencyGrant Number
NASANAS7-100
NASANSG 2229
Issue or Number:23
Record Number:CaltechAUTHORS:20140924-094540365
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140924-094540365
Official Citation: Pressure and temperature dependence kinetics study of the nitric oxide + bromine oxide .fwdarw. nitrogen dioxide + bromine reaction. Implications for stratospheric bromine photochemistry R. T. Watson, S. P. Sander, and Y. L. Yung The Journal of Physical Chemistry 1979 83 (23), 2936-2944
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49982
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:24 Sep 2014 17:19
Last Modified:09 Mar 2020 13:19

Repository Staff Only: item control page