The effect of changing reagent energy on reaction dynamics.: V. Reagent translation and vibration in H+ F2→ HF+ F.

Abstract:

The reaction H + F2 → HF + F has been studied using the arrested-relaxation infrared chemiluminescence method. For comparison with an earlier study in which the reagents were at room temperature the reagent energy was enhanced (a) translationally by formation of the H atoms in a tungsten oven at temperatures up to 2800 K, and (b) vibrationally and rotationally by heating the F2 in a nickel oven up to 900 K. In the first case the mean reagent translational energy was increased up to <T> ≈ 10.4 kcal mole−1, substantially in excess of the threshold energy for reaction. The excess energy was found to be channelled fully into product translation and rotation: ΔT → ΔT′ + ΔR′. The peak of the product vibrational excitation shifted from υ′ = 6 down to υ′ = 5. Heating the F2 led to an increase of the mean reactant vibrational energy of approximately 0.8 kcal mole−1. The effect on the product energy-distribution …

Año de publicación:

1976

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Fuente:

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