Ozone Formation by UV Light
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3O2 → 2O3
Descripción general
Ultraviolet radiation (wavelength < 240 nm) splits O₂ molecules in the stratosphere. The resulting oxygen atoms combine with intact O₂ to form ozone (O₃). This Chapman cycle creates the ozone layer at 15–35 km altitude, which absorbs 97–99% of UV-B and UV-C radiation that would otherwise damage DNA.
Participantes
| Rol | Sustancia | Coeficiente | Estado |
|---|---|---|---|
| Producto | Ozone O₃ | 2 | (g) |
Ejemplo cotidiano
The ozone layer protects life on Earth from harmful UV radiation. Without it, rates of skin cancer and cataracts would skyrocket.
Importancia industrial
Fundamento de la capa de ozono protectora y base para tecnologías de ozonización en tratamiento de agua potable.
Propiedades
- Tipo
- Photochemical
- Reversible
- Sí
- Energía
- Endotérmico
- ΔH
- 285,4 kJ/mol