A Fourier Transform Infrared Study of the Rate Constant of the Homogeneous Gas-Phase Reaction N2O5 + H2O and Determination of Absolute Infrared Band Intensities of N2O5 and HNO3

Article abstract of DOI:10.1021/j100290a055

N2O5 was reacted with water vapor in large FEP-Teflon bags and its decay followed by samplig in a White gas cell using infrared Fourier transform spectroscopy.A rate constant for the homogeneous N2O5 + H2O gas-phase reaction at 296 +/- 2 K and 740 Torr total pressure equel to (1.48 +/- 0.42)E-21 cm³/molecule*s was observed.Critical analysis of the results suggested that the true homogeneous rate constant might be lower.The measured HNO3 absolute intensities of the overlapping band systes $v₅, 2$v₉ and $v₅ + $v₉ - $v₉ (840-930/cm) and $v₃,$v₄ (1270-1350/cm) were 2.21E-17 and 4.29E-17 cm/molecule, respectively.