Silver Chloride Photodecomposition
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2AgCl → 2Ag + Cl2
概述
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.
参与者
| 角色 | 物质 | 系数 | 状态 |
|---|---|---|---|
| 反应物 | Silver Chloride AgCl | 2 | (s) |
| 产物 | Silver Ag | 2 | (s) |
日常示例
Traditional black-and-white photography relied on this reaction — light hitting AgCl-coated film created a latent image of metallic silver.
工业重要性
银卤化物摄影技术在数字摄影兴起前统治影像行业长达150年，氯化银光分解是其核心化学过程。
属性
- 可逆
- 否
- 能量
- 吸热
- ΔH
- 254.0 kJ/mol
相关反应
Photochemical Smog Formation (NO₂ Photolysis)
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
Dye-Sensitized Solar Cell (Grätzel Cell)
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.