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  • A FOURIER TRANSFORM INFRARED STUDY OF THE RATE CONSTANT OF THE HOMOGENEOUS GAS PHASE REACTION N-2O-5 + H-2O AND DETERMINATION OF ABSOLUTE INFRARED BAND INTENSITIES OF N-2O-5 AND HNO-3

Abstract

N-2O-5 was reacted with water vapor in large FEP- Teflon bags and its decay followed by sampling in a White gas cell using infrared Fourier transform spectroscopy. A rate constant for the homogeneous N-2O-5 + H-2O gas- phase reaction at 296 +- 2 K and 740 Torr total pressure equal to (1.48 +- 0.42) x 10**-21 cm**3 molecule**- 1- s**-1 was observed. Critical analysis of the results suggests that the true homogeneous rate constant might be lower. The measured absolute intensities of the N-2O-5 710-780- and 1225-1270-cm**-1 bands were 4.57 x 10**-17 cm molecule**-1, respectively. The measured HNO-3 absolute intensities of the overlappinng band systems n-u-5, 2-nu-9, and n-u-5 + n-u-9 - n-u-9 (840-930 cm**-1) and n-u-3, n-u-4 (1270-1350 cm**-1) were 2.21 x 10**-17 and 4.29 x 10**-17 cm molecule**-1, respectively.

Additional information

Authors: HJORTH J, JRC-ISPRA;OTTOBRINI G, JRC-ISPRA;CAPPELLANI F, JRC-ISPRA;RESTELLI G> JRC-ISPRA, JRC-ISPRA
Bibliographic Reference: THE JOURNAL OF PHYSICAL CHEMISTRY, VOL. 91 (1987), PP. 1565-1568
Record Number: 1989126010600 / Last updated on: 1989-03-01
Category: PUBLICATION
Available languages: en
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