High temperature vibrational relaxation of H2O by H2O, He, Ar, and N2
- 15 March 1975
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 62 (6), 2187-2194
- https://doi.org/10.1063/1.430786
Abstract
The vibrational relaxation of H2O by H2O, He, Ar, and N2 has been studied behind incident shock waves at temperatures between 1800 and 4100°K. The relaxation processes were monitored by the observation of the infrared emission of the water vapor at 6.3 μ (the bending mode) and 2.7 μ (the asymmetric mode). The relaxation times for the two modes were found to be essentially the same with little temperature dependence. This implies rapid intramolecular energy transfer between the various modes. Measured values of pτ are 7.6×10−3, 0.23, 0.49, and 0.69 μsec⋅atm, respectively, for H2O−H2O, H2O−He, H2O−Ar, and H2O−N2 collisions.Keywords
This publication has 25 references indexed in Scilit:
- Vibration-to-rotation energy transfer in water, heavy water, and ammoniaThe Journal of Physical Chemistry, 1973
- Vibrational relaxation in carbon dioxide with selected collision partners. I. Water and heavy waterThe Journal of Physical Chemistry, 1972
- Shock Tube Vibrational Relaxation Measurements: N2 Relaxation by H2O and the CO–N2 V–V RateThe Journal of Chemical Physics, 1972
- Thermal Relaxation in Humid AirThe Journal of the Acoustical Society of America, 1969
- Thermal Relaxation in Nitrogen with Wet Carbon Dioxide as ImpurityThe Journal of the Acoustical Society of America, 1969
- Effect of Water Vapor on the Napier Frequency of Oxygen and AirThe Journal of the Acoustical Society of America, 1965
- Thermal Relaxation in Oxygen with H2O, HDO, and D2O Vapors as ImpuritiesThe Journal of the Acoustical Society of America, 1965
- Vibrational and Rotational Relaxation in Water VaporThe Journal of the Acoustical Society of America, 1965
- Ultrasonic Absorption and Relaxation Times in Nitrogen, Oxygen, and Water VaporThe Journal of the Acoustical Society of America, 1963
- Acoustic Attenuation and Relaxation Phenomena in Steam at High Temperature and PressureJournal of Engineering for Power, 1961