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X‐ray photoelectron spectroscopic studies of the heterogenous reaction of gaseous nitric acid with sodium chloride: Kinetics and contribution to the chemistry of the marine troposphere
Author(s) -
Laux J. M.,
Hemminger J. C.,
FinlaysonPitts B. J.
Publication year - 1994
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/94gl01196
Subject(s) - chemistry , photodissociation , troposphere , chlorine , x ray photoelectron spectroscopy , nitric acid , chemical kinetics , kinetics , ozone , reaction rate , sodium nitrate , atmospheric chemistry , reaction mechanism , inorganic chemistry , photochemistry , catalysis , organic chemistry , meteorology , chemical engineering , physics , quantum mechanics , engineering
We report here the first measurement of the reaction probability (ϕ) at 298 K for the reaction (1) HNO 3(g) + NaCl (s) → HCl (g) + NaNO 3(s) , ϕ = (4±2) × 10 −4 , which was determined using X‐ray photoelectron spectroscopy to follow the formation of nitrate on the surface of single crystals of NaCl. Along with recent kinetic data for the reaction N 2 O 5(g) + NaCl (s) → ClNO 2(g) + NaNO 3(s) , we show that in the dark with typical relative concentrations of N 2 O 5 and HNO 3 , the N 2 O 5 reaction should be competitive with, and may exceed, that of HNO 3 . The reactions of NO 2 and ClONO 2 with NaCl are expected to be much less important. Thus, the tropospheric production of chlorine atoms via photolysis of ClNO 2 from the N 2 O 5 reaction is anticipated, which has the potential to impact the ozone balance in the troposphere.