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

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.