Energy Disposal in the Products of the Reaction O+ + CO2 Equals O2+ + CO
Abstract
The reaction O+ + CO2 yields O2(+) + CO is exothermic by 1.19 eV. Although spin forbidden for reactants and products in their ground states, the reaction is fast (k=9.6 x 10 to the -10th power cc/s) at thermal energies. Ion beam experiments in the energy range from 0.8 to 6.5 eV (lab) show that the translational exothermicity of the reaction (the reaction enthalpy which is converted to translational energy of the products) is negative and equal to the relative energy. The product(s) in these beam experiments must therefore be excited. Experiments in a selected ion flow tube at temperatures of 88 K, 150 K, and 300 K, using the monitor ion technique to determine the vibrational energy distribution in the O2(+) product, show that the majority of the O2(+) ions formed in the reaction of O+ with CO2 at thermal energies are vibrationally excited. The principal ion product energy level appears to be O2(+)(v = 1), with a population of about 45% of the total O2(+) production. Keywords: Translational exoergicity; Vibrational excitation; Vibrational quenching; Rate constants; Reprints.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 24, 1990
- Accession Number
- ADA220962
Entities
People
- A. A. Viggiano
- J. F. Paulson
- R. A. Morris
Organizations
- Air Force Systems Command