Photolysis of Water (Vacuum UV)
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H2O → H· + OH·
개요
Vacuum UV radiation (< 185 nm) directly dissociates water molecules into hydrogen and hydroxyl radicals. This reaction is significant in atmospheric chemistry on Mars and early Earth, where the photolysis of water vapor contributed to the loss of hydrogen to space and the oxidation of surface minerals.
참여 물질
| 역할 | 물질 | 계수 | 상태 |
|---|---|---|---|
| 반응물 | Water H₂O | 1 | (g) |
일상 속 예시
Mars lost most of its water over billions of years partly because UV photolysis split water vapor in the upper atmosphere.
산업적 중요성
진공 자외선 물 광분해는 반도체 제조용 초순수 처리와 우주 환경 시뮬레이션에 사용됩니다.
성질
- 가역 반응
- 아니오
- 에너지
- 흡열
- ΔH
- 498.0 kJ/mol
관련 반응
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 Photolysis of Water (Vacuum UV)?
The balanced equation is: H₂O → H· + OH·.
What type of reaction is Photolysis of Water (Vacuum UV)?
Photolysis of Water (Vacuum UV) is a photochemical reaction.
Is Photolysis of Water (Vacuum UV) exothermic or endothermic?
Photolysis of Water (Vacuum UV) is endothermic (absorbs energy). The enthalpy change (ΔH) is 498.0 kJ/mol.