Photochemical Smog Formation (NO₂ Photolysis)
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NO2 → NO + O·
概要
Sunlight (< 420 nm) photolyzes nitrogen dioxide to produce nitric oxide and an oxygen atom. The oxygen atom then reacts with O₂ to form ground-level ozone. Combined with volatile organic compounds from vehicle exhaust, this initiates the complex photochemical smog cycle that plagues urban areas.
参加者
| 役割 | 物質 | 係数 | 状態 |
|---|---|---|---|
| 反応物 | Nitrogen Dioxide NO₂ | 1 | (g) |
| 生成物 | Nitric Oxide NO | 1 | (g) |
日常の例
The brown haze visible over cities like Los Angeles on sunny days is photochemical smog, driven by this NO₂ photolysis.
産業上の重要性
NO₂の光化学を理解することは、大気質規制、触媒コンバーターの設計、都市の汚染対策に不可欠である。
特性
- タイプ
- Photochemical
- 可逆的
- いいえ
- エネルギー
- 吸熱性
- ΔH
- 305.0 kJ/mol
関連する反応
Photochromism of Spiropyran
Chlorophyll Fluorescence
Photodegradation of Methylene Blue by TiO₂
Photodissociation of Chlorine Gas
Silver Bromide Photodecomposition
Cis-Trans Isomerization of Retinal
Photosynthesis
Ozone Formation by UV Light
Silver Chloride Photodecomposition
Dye-Sensitized Solar Cell (Grätzel Cell)
Frequently Asked Questions
What is the equation for Photochemical Smog Formation (NO₂ Photolysis)?
The balanced equation is: NO₂ → NO + O·.
What type of reaction is Photochemical Smog Formation (NO₂ Photolysis)?
Photochemical Smog Formation (NO₂ Photolysis) is a photochemical reaction.
Is Photochemical Smog Formation (NO₂ Photolysis) exothermic or endothermic?
Photochemical Smog Formation (NO₂ Photolysis) is endothermic (absorbs energy). The enthalpy change (ΔH) is 305.0 kJ/mol.