Silver Chloride Photodecomposition
2AgCl → 2Ag + Cl2
概要
Silver chloride darkens upon exposure to light as photons provide enough energy to reduce Ag⁺ to metallic silver. This photosensitivity of silver halides is the fundamental chemistry behind traditional photography. The released chlorine atoms combine to form Cl₂ gas.
参加者
| 役割 | 物質 | 係数 | 状態 |
|---|---|---|---|
| 反応物 | Silver Chloride AgCl | 2 | (s) |
| 生成物 | Silver Ag | 2 | (s) |
日常の例
Traditional black-and-white photography relied on this reaction — light hitting AgCl-coated film created a latent image of metallic silver.
産業上の重要性
ハロゲン化銀写真は150年間画像技術を支配した。AgClは太陽光で暗くなる調光レンズにも現在使用されている。
特性
- タイプ
- Photochemical
- 可逆的
- いいえ
- エネルギー
- 吸熱性
- ΔH
- 254.0 kJ/mol
関連する反応
Cis-Trans Isomerization of Retinal
Luminol Chemiluminescence
Firefly Bioluminescence (Luciferin Oxidation)
Photolysis of Water (Vacuum UV)
Photochemical Smog Formation (NO₂ Photolysis)
Photodegradation of Methylene Blue by TiO₂
Photodissociation of Chlorine Gas
Silver Bromide Photodecomposition
Photosynthesis
Chlorophyll Fluorescence
Frequently Asked Questions
What is the equation for Silver Chloride Photodecomposition?
The balanced equation is: 2AgCl → 2Ag + Cl₂.
What type of reaction is Silver Chloride Photodecomposition?
Silver Chloride Photodecomposition is a photochemical reaction.
Is Silver Chloride Photodecomposition exothermic or endothermic?
Silver Chloride Photodecomposition is endothermic (absorbs energy). The enthalpy change (ΔH) is 254.0 kJ/mol.