Silver Bromide Photodecomposition

2AgBr → 2Ag + Br2

Aperçu

Silver bromide is more photosensitive than silver chloride and was the primary photosensitive material in photographic film. Blue and UV light excite electrons in the AgBr crystal lattice, reducing silver ions at crystal defects to form a latent image. Chemical development then amplifies these silver clusters.

Participants

Rôle Substance Coefficient État
Produit Silver Ag 2 (s)

Exemple du quotidien

Color and black-and-white photographic film used AgBr crystals in gelatin emulsion to capture images for over a century.

Importance industrielle

AgBr was central to the multi-billion dollar photographic film industry. Kodak and Fuji built global businesses on AgBr emulsion technology.

Propriétés

Type
Photochemical
Réversible
Non
Énergie
Endothermique
ΔH
199,0 kJ/mol

Réactions associées

Photochemical Smog Formation (NO₂ Photolysis) Photochromism of Spiropyran Chlorophyll Fluorescence Photodegradation of Methylene Blue by TiO₂ Photodissociation of Chlorine Gas 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 Silver Bromide Photodecomposition?
The balanced equation is: 2AgBr → 2Ag + Br₂.
What type of reaction is Silver Bromide Photodecomposition?
Silver Bromide Photodecomposition is a photochemical reaction.
Is Silver Bromide Photodecomposition exothermic or endothermic?
Silver Bromide Photodecomposition is endothermic (absorbs energy). The enthalpy change (ΔH) is 199.0 kJ/mol.