Photodissociation of Chlorine Gas

Cl2 → 2Cl·

개요

UV or visible light (< 500 nm) cleaves the Cl–Cl bond homolytically to produce two chlorine free radicals. This is the initiation step in many radical chain reactions, including the chlorination of hydrocarbons. Each chlorine radical can propagate thousands of reaction cycles before termination.

일상 속 예시

The chlorination of methane to produce chloromethane begins with this UV-initiated splitting of chlorine gas.

산업적 중요성

자유 라디칼 염소화는 염소화 용제, PVC(폴리염화비닐), 다양한 염소화 유기 화합물을 제조하는 데 사용됩니다.

성질

유형
Photochemical
가역 반응
아니오
에너지
흡열
ΔH
242.6 kJ/mol

관련 반응

Photochemical Smog Formation (NO₂ Photolysis) Photochromism of Spiropyran Chlorophyll Fluorescence Photodegradation of Methylene Blue by TiO₂ Silver Bromide Photodecomposition 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 Photodissociation of Chlorine Gas?
The balanced equation is: Cl₂ → 2Cl·.
What type of reaction is Photodissociation of Chlorine Gas?
Photodissociation of Chlorine Gas is a photochemical reaction.
Is Photodissociation of Chlorine Gas exothermic or endothermic?
Photodissociation of Chlorine Gas is endothermic (absorbs energy). The enthalpy change (ΔH) is 242.6 kJ/mol.