Silver Chloride Photodecomposition

2AgCl → 2Ag + Cl2

Übersicht

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.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Silver Chloride AgCl 2 (s)
Produkt Silver Ag 2 (s)

Alltägliches Beispiel

Traditional black-and-white photography relied on this reaction — light hitting AgCl-coated film created a latent image of metallic silver.

Industrielle Bedeutung

Silver halide photography dominated imaging for 150 years. AgCl is still used in photochromic lenses that darken in sunlight.

Eigenschaften

Typ
Photochemical
Reversibel
Nein
Energie
Endotherm
ΔH
254,0 kJ/mol

Verwandte Reaktionen

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.