13052 J. Phys. Chem., Vol. 99, No. 34, 1995
Additions and Corrections
ADDITIONS AND CORRECTIONS 1994, Volume 98
1995, Volume 99
Rainer Vogt and Barbara J. Finlayson-Pitts* : A Diffuse Reflectance Infrared Fourier Transform Spectroscopic (DRIFTS) Study of the Surface Reaction of NaCl with Gaseous NO? and HNO3
A. M. Micu,* D. Durand, M. Quilichini, M. J. Field, and J. C. Smith: Collective Vibrations in Crystalline L-Alanine
Pages 3747-3755. An error in the calibration of a flowmeter used in the above study has been discovered. The correction results in lower NO2 and N204 concentrations than reported and hence a higher reaction probability for the N204 NaCl reaction of (1.3 f 0.6) x (lo) at 298 K. The corrected data for Figure 15 continue to give a reaction order of 1.6 in NO?, but with an increased error of f 0 . 3 ( 2 4 . A corrected version of Table 1 follows.
+
TABLE 1: Summary of Kinetic Results from the Reaction
NO,
+ NaCl
I 2 3 4 5 6 7 8 9 IO
3.4 8.0 8.7 18 5.2 1.7 2.6 2.0 2.5 14 6.8 1.8
11
12
0.28 1.6 1.9 8.4 0.69 0.071 0.17 0.10 0.15 4.6 1.2 0.081
3.2 18 21 93 7.6 0.79 1.9 1.1 1.7 51 13 0.89
0.11 1.1
0.96 3.1 0.43 0.070 0.19 0.089 0.10 0.95 0.38 0.038
2.6 26 23 75 II 1.7 4.6 2.2 2.5 23 9.2 0.92
0.82 1.5 1.1 0.8 I I .4 2.2 2.4 1.9 1.5 0.45 0.71 1.0
" I n units of IO" molecules cm-?; carrier gas was He except for runs 10-12 where air was used. " I n units of IO" molecules cm-3, cm3 calculated from the equilibrium constant K9 = 2.5 x molecule-'. Collision rate of Nz0, with the NaCl surface ( A = 1.7 x IO3 cm? per pellet) in units of IO" collisions s-', "Observed rates (integrated absorbance units min-I) of nitrate formation obtained from the integrated area of all absorptions in the vj region. Rate of nitrate formation in 10" ions s-I per pellet calculated from R and the integrated infrared absorption in the vi region calibrated by chemical analysis of the nitrate as described in the text. Gas-solid reaction probability for the Nz04-NaCI reaction in units of IO-'. [
The concentrations in the figure captions and the associated text should be revised as follows: Figures 3-5, 8, and 9, [NO?] = 8.6 x l o i 4molecules ~ m - [HNO3] ~, = 1.5 x lOI4 molecules ~ m - Figure ~; 7, [Nor] = 2.0 x 1014 molecules ~ m - Figure ~; 10, [DN03] = 5 x l o i 3molecules ~ m - Figure ~ ; 11, [NO?] = 2.8 x l o i 4molecules ~ m - Figure ~ ; 12, NO2 concentrations in units of loi4molecules ~ m - ~NaCl : reaction, 8.6; NaBr reaction, 7.3;KCl reaction, 9.9; Figure 14, [Nor] = 1.7 x lOI4 molecules ~ m - ~These . changes do not alter the discussion or conclusions regarding the data in these figures. The conclusions of the paper remain unchanged, namely, that the reaction is approximately second order in NO? and that this reaction is too slow to be important in the tropospheric reactions of sea salt particles. The conclusions regarding the formation of a quasi-liquid layer at water vapor concentrations below the deliquescence point of NaCl remain unchanged. JP95 1676X
Page 5651. In Figure 6b, the ordinate values should be multiplied by 10, therefore going from 0 to 30 kcaVmol instead of 0 to 3 kcaVmo1. JP95 I7 l9+
