Ozone Decomposition by UV
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2O3 → 3O2
Visão geral
UV-C radiation (< 240 nm) and UV-B (240–320 nm) break ozone back into molecular oxygen and atomic oxygen. This absorption of UV is precisely what protects life on Earth. The steady-state balance between ozone formation and decomposition maintains the ozone layer thickness.
Participantes
| Papel | Substância | Coeficiente | Estado |
|---|---|---|---|
| Reagente | Ozone O₃ | 2 | (g) |
Exemplo do cotidiano
Sunscreen with high SPF is needed because not all UV is filtered by ozone — the remaining UV-A and some UV-B still reach the surface.
Importância industrial
Compreender a fotoquímica do ozono é fundamental para monitorizar o buraco de ozono e prever os níveis de exposição UV em todo o mundo.
Propriedades
- Tipo
- Photochemical
- Reversível
- Não
- Energia
- Exotérmico
- ΔH
- -285,4 kJ/mol