Measurements have been made on the vibration-vibration (V-V) energy exchange rate between carbon monoxide and carbon dioxide in the temperature range 180 to 345 K. A steady-state vibrational fluorecence quenching technique was used in conjunction with an open flow gas system. Vibrational excitation of the carbon monoxide was accomplished by absorption of infrared radiation from prospane-oxygen flames. The measured rate constant for the process CO* (υ = 1) + CO2→ CO + CO*2(001) increased linearly with temperature, and after correction for the V-V exchange rate fo the back reaction, the rate constant has a value of (2.2 ± 0.3) × 103torr-1s-1at 296 K. The data are compared to results at highest temperatures and to available theoretical calculations. © 1974.
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