翰林提供学术活动、国际课程、科研项目一站式留学背景提升服务!
400 888 0080
首页
国际课程
A-Level课程
IB课程
AP课程
IGCSE课程
美高课程
国际竞赛
理科竞赛
STEM竞赛
商科竞赛
文科竞赛
丘成桐中学科学奖
热门资讯
学校动态
赛事动态
课程动态
学员奖项
2024-至今年度奖项
2022-2023年度奖项
2020-2021年度奖项
真题资料
联系我们
翰林导师
加入我们
商务合作
Home
»
国际课程
»
A-level课程
»
Details
AQA A Level Chemistry复习笔记3.3.3 Ozone Depletion
Category:
A-level课程
,
教材笔记
,
福利干货
Date: 2022年6月30日 下午3:46
Uses
Fluorohalogenoalkanes
The most common halogenoalkanes are chlorofluorocarbons (CFCs)
These compounds contain carbon atoms with chlorine and fluorine atoms attached to them
E.g. CCl3F and CCl2F2
CFCs have many uses due to their chemical inertness as they are non-flammable and non-toxic
They are used as refrigerators
Propellants for aerosols
As solvents for dry cleaning
Hydrofluorocarbons
Hydrofluorocarbons (HFCs) are compounds that contain a carbon attached to hydrogen and fluorine atoms only
Eg. CH2F-CF3
As with CFCs, HFCs are chemically inert and are therefore used for a wide range of purposes
Halogenoalkanes & The Ozone Layer
Though chlorofluorocarbons (CFCs) have many beneficial uses, they also have devastating effects on the ozone layer:
CFCs absorb a lot of UV radiation in the upper atmosphere
The CFCs are then broken down by the UV light causing the formation of chlorine radicals
These radicals react with ozone and break down the ozone layer
This is why hydrofluorocarbons (HFCs) are often used as an alternative to CFCs
As these compounds don’t contain any chlorine atoms, they will not have adverse effects on the ozone layer
Chlorine radicals and the ozone layer
转载自savemyexams
Previous post: AQA A Level Chemistry复习笔记3.3.2 Reactions of Halogenoalkanes
Next post: AQA A Level Chemistry复习笔记3.4.2 Isomerism in Alkenes
翰林福利
站内搜索
在线登记
最新发布
【NEC组队】领科、贝赛思、平和等强校学霸邀你强强联手,共摘桂冠!
直播预告-北上广深第一梯队国际学校都冲哪些物理竞赛?CFA大神告诉你哪些是“天花板”级经济商赛!
IB数学选AA还是AI?哪个可以拿到更高分?附IB数学备考资料
牛剑入学笔试时间公布!还记得笔试变化有哪些吗?
化学UKChO、CCC两大竞赛如何选?一文带你理清区别!
生物届两大“顶流”USABO、BBO赛事详解!如何一次备考冲击“双金”?
新校区!新项目!翰林将助力更多学子冲击顶尖梦校!
LSE首选的A-level科目有哪些?非首选科目有哪些?不认可的科目有哪些?
热门标签
AMC
物理碗
BBO
AMC8
欧几里得数学竞赛
Physics Bowl
AMC10
John Locke
AMC12
USABO
USACO
PhysicsBowl
AIME
NEC
BPhO
丘成桐中学科学奖
欧几里得
HiMCM美国高中数学建模竞赛
UKChO
SIC
Euclid
Brain bee
IEO
袋鼠数学竞赛
CCC加拿大化学竞赛
© 2024. All Rights Reserved.
沪ICP备2023009024号-1
项目咨询
了解背提项目
了解课程
了解课程
微信咨询
Go to top