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Table 6
Formation and destruction of C2H2 in kinetic chemical equilibrium at T = 1200 K and n〈H〉=7.56 × 1013 cm−3.
| Formation reactions | Rates (cm−3 s−1) |
|---|---|
| C2H + H2 → C2H2 + H | 1.60(−13) |
| C2H3 + M → C2H2 + H + M | 1.01(−14) |
| C2H3 + H → C2H2 + H2 | 2.20(−16) |
| C2H + H2 O → C2H2 + OH | 4.12(−17) |
| CH3 + CO → C2H2 + OH | 2.94(−18) |
| C2H4 + M → C2H2 + H2 + M | 1.35(−18) |
| Destruction reactions | Rates [cm−3 s−1] |
| C2H2 + H → C2H + H2 | 1.60(−13) |
| C2H2 + H + M → C2H3 + M | 1.01(−14) |
| C2H2 + H2 → C2H3 + H | 2.20(−16) |
| C2H2 + OH → C2H + H2 O | 4.12(−17) |
| C2H2 + OH → CO + CH3 | 2.94(−18) |
| C2H2 + H2 + M → C2H4 + M | 1.35(−18) |
| Particle density in chemical kinetics nC2H2 | 7.272 × 10−8 cm−3 |
| In thermodynamic equilibrium nC2H2 | 7.273 × 10−8 cm−3 |
| Total destruction/formation rate | 1.7 × 10−13 cm−3 s−1 |
| C2H2 relaxation timescale | 0.014 yr |
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