Silver Chloride Photodecomposition
2AgCl → 2Ag + Cl2
Ikhtisar
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.
Peserta
| Peran | Zat | Koefisien | Keadaan |
|---|---|---|---|
| Reaktan | Silver Chloride AgCl | 2 | (s) |
| Produk | Silver Ag | 2 | (s) |
Contoh Sehari-hari
Traditional black-and-white photography relied on this reaction — light hitting AgCl-coated film created a latent image of metallic silver.
Pentingnya dalam Industri
Silver halide photography dominated imaging for 150 years. AgCl is still used in photochromic lenses that darken in sunlight.
Sifat
- Jenis
- Photochemical
- Dapat Dibalik
- Tidak
- Energi
- Endoterm
- ΔH
- 254,0 kJ/mol
Reaksi Terkait
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.