Does CFC react with oxygen?
CFCs do not easily react with other substances. In fact, they break up only through sunlight, which divides their molecules, causing the release of chlorine (Cl). Once the chlorine is released, it is able to react with ozone (O3), to form chlorine monoxide (ClO) and oxygen (O2).
How does CFC destroy ozone layer?
Once in the atmosphere, CFCs drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing chlorine atoms, which are able to destroy ozone molecules.
Where do CFC reactions occur?
Rowland and Molina report that CFC molecules end up in the stratosphere, where they react to destroy ozone.
What happens to the CFC molecule in the lower atmosphere?
In the lower atmosphere, CFCs are protected from ultraviolet radiation by the ozone layer itself. CFC molecules thus are able to migrate intact up into the stratosphere. Although the CFC molecules are heavier than air, the air currents and mixing processes of the atmosphere carry them into the stratosphere.
What do CFCs react with?
Gaseous CFCs can deplete the ozone layer when they slowly rise into the stratosphere, are broken down by strong ultraviolet radiation, release chlorine atoms, and then react with ozone molecules. See Ozone Depleting Substance.)
What are the reactions involved in ozone layer depletion?
The most reactive of these gases are chlorine monoxide (ClO), bro- mine monoxide (BrO), and chlorine and bromine atoms (Cl and Br). These gases participate in three principal reaction cycles that destroy ozone.
What happens when CFC react with ozone?
How do CFCs enter the atmosphere?
The most common source of CFCs are refrigerants, but fire suppression systems for aircraft and aerosols also emit CFCs into the atmosphere.
Why are CFCs unreactive?
Chlorofluorocarbons are unreactive towards oxidation Because of their oxidation reactions, hydrocarbons have a limited lifetime in the troposphere and don’t migrate to the stratosphere. Carbon-containing molecules without C-H bonds can’t react with hydroxyl radical.
Are CFCs reactive?
CFCs do not react easily with other chemicals in the lower atmosphere (troposphere). But UV light can break up a CFC, making it highly reactive. In the lower atmosphere, CFCs are protected from UV light from the ozone layer in the stratosphere. But as CFCs rise, they move into the stratosphere.
Do the reactions involved in ozone depletion involve changes in oxidation state of the O atoms?
Overall, the oxidation state of O in the breakdown of ozone does not change.
Why CFC is a strong greenhouse gas?
While acting to destroy ozone, CFCs and HCFCs also act to trap heat in the lower atmosphere, causing the earth to warm and climate and weather to change. HFCs, which originally were developed to replace CFCs and HCFCs, also absorb and trap infrared radiation or heat in the lower atmosphere of the earth.
Which reaction is involved in ozone formation?
Ozone is formed when heat and sunlight cause chemical reactions between oxides of nitrogen (NOX ) and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons. This reaction can occur both near the ground and high in the atmosphere.
How do I switch from o2 to O3?
Removal: if an oxygen atom and an ozone molecule meet, they recombine to form two oxygen molecules: O3 + O → 2 O. And if two oxygen atoms meet, they react to form one oxygen molecule: 2 O → O.
What is the reactive component of chlorofluorocarbon?
CFCs degrade in the stratosphere by photolytic breakdown, releasing highly reactive atoms of chlorine and fluorine, which then form simple compounds such as chlorine monoxide (ClO).
What is the chemical reaction of ozone layer depletion?
The term ozone depletion means that the destruction of O3 exceeds the creation of O3. When present together in the stratosphere, chlorine (Cl) and ozone quickly react to produce chlorine oxide. Bromine can also act as a catalyst to destroy stratospheric ozone.
How can CFC gases be reduced?
Buy air-conditioning and refrigeration equipment that do not use HCFCs as refrigerant. Buy aerosol products that do not use HCFCs or CFCs as propellants. Conduct regular inspection and maintenance of air-conditioning and refrigeration appliances to prevent and minimize refrigerant leakage.
Why can CFC destroy the ozone so easily?
The chlorine content can potentially destroy parts of the ozone when the right conditions appear. When the CFCs reach the ozone layer, ultraviolet radiation occurring at this altitude breaks down the compound and releases the chlorine.
Why do CFCs destroy ozone?
– chlorofluorocarbons (CFCs) – halon. – carbon tetrachloride (CCl4) – methyl chloroform (CH3CCl3) – hydrobromofluorocarbons (HBFCs) – hydrochlorofluorocarbons (HCFCs) – methyl bromide (CH3Br) – bromochloromethane (CH2BrCl)
What effect does CFC the have on the ozone?
Solution: Purchase air conditioning and refrigeration equipment that does not include CFCs as a refrigerant.
What are molecules destroy the ozone Besides CFC’s?
Stratospheric ozone has been diminished by CFCs and other refrigerants-propellants released into the atmosphere. These compounds are broken down by the sun’s UV rays and release chlorine and bromine molecules that destroy the ozone. Scientists estimate that one chlorine atom can destroy 100,000 ozone molecules over its life in the stratosphere.