Summary of the Article: CFCs and Their Impact on the Environment
1. CFCs: What are they?
Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals composed of carbon, chlorine, and fluorine. They are used in various industries, including aerosol sprays, foams, solvents, and refrigerants.
2. Examples of CFCs
– Chlorofluoromethane (Freon 31, R-31, HCFC-31): CH2ClF
– Bromochlorodifluoromethane (BCF, Halon 1211, H-1211, Freon 12B1CBrClF2): CHBrClF2
– 1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113, R-113, CFC-113): CCl2FCClF2
3. Two Common CFCs
The most abundant CFCs emitted into the troposphere are CFC 11 and CFC 12. These CFCs are not soluble in water, so deposition does not remove them from the air.
4. CFC Refrigerants
CFC refrigerants, indicated by the presence of chlorine, fluorine, and carbon, include R-11, R-12, R-13, R-113, R-114, and R-115. Even blends containing CFCs are classified as CFC refrigerants.
5. Replacement of CFCs
CFCs have been replaced by Hydro Fluorocarbons (HFCs) and Hydrochlorofluorocarbons (HCFCs) due to their harmful effects on the ozone layer and the environment.
6. CFCs in Refrigerators
CFCs, specifically freon, used to be the primary refrigerant in older fridges. However, modern refrigerators no longer use freon as it is harmful to the environment.
7. Greenhouse Gases
There are seven main types of greenhouse gases: carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulfur hexafluoride (SF6), and nitrogen trifluoride (NF3).
8. Main CFCs
The five main CFCs are CFC-11 (trichlorofluoromethane – CFCl3), CFC-12 (dichloro-difluoromethane – CF2Cl2), CFC-113 (trichloro-trifluoroethane – C2F3Cl3), CFC-114 (dichloro-tetrafluoroethane – C2F4Cl2), and CFC-115 (chloropentafluoroethane – C2F5Cl).
9. R-22 and CFCs
R-22, also known as chlorodifluoromethane, is a hydrochlorofluorocarbon (HCFC) refrigerant that was commonly used as a replacement for CFCs. It has also been phased out due to its harmful environmental impacts.
Questions and Answers:
1. What are three examples of CFCs and their formulas?
– Chlorofluoromethane (CH2ClF)
– Bromochlorodifluoromethane (CHBrClF2)
– 1,1,2-Trichloro-1,2,2-trifluoroethane (CCl2FCClF2)
2. What are CFCs and how are they used?
CFCs are non-toxic, nonflammable chemicals used in various industries, including aerosol sprays, foams, solvents, and refrigerants.
3. Which are the two most common CFCs found in the troposphere?
The most abundant CFCs emitted into the troposphere are CFC-11 and CFC-12.
4. What are examples of CFC refrigerants?
Examples of CFC refrigerants include R-11, R-12, R-13, R-113, R-114, and R-115.
5. What gases have replaced CFCs?
CFCs have been replaced by Hydro Fluorocarbons (HFCs) and Hydrochlorofluorocarbons (HCFCs).
6. Is freon still used in refrigerators?
Freon, which is a CFC, is no longer used in modern refrigerators.
7. What are the seven main greenhouse gases?
The seven main greenhouse gases are carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), HFCs, PFCs, SF6, and NF3.
8. Name the five main CFCs.
The five main CFCs are CFC-11, CFC-12, CFC-113, CFC-114, and CFC-115.
9. What is R-22 and its relation to CFCs?
R-22 is a hydrochlorofluorocarbon (HCFC) refrigerant that was commonly used as a replacement for CFCs, but it has also been phased out due to its harmful environmental effects.
What are 3 examples of CFCs
Numbering system
| Principal CFCs | ||
|---|---|---|
| Systematic name | Common/trivial name(s), code | Formula |
| Chlorofluoromethane | Freon 31, R-31, HCFC-31 | CH2ClF |
| Bromochlorodifluoromethane | BCF, Halon 1211, H-1211, Freon 12B1 | CBrClF2 |
| 1,1,2-Trichloro-1,2,2-trifluoroethane | Freon 113, R-113, CFC-113, 1,1,2-Trichlorotrifluoroethane | Cl2FC-CClF2 |
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What gases are CFC
Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.
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What are the 2 most common CFCs
The most abundant CFCs emitted into the troposphere are CFC 11 and CFC 12. These CFCs are not soluble in water, so deposition does not removed them from the air.
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What are examples of CFC refrigerants
Chlorofluorocarbon indicates that the refrigerant is comprised of Chlorine, Fluorine, and Carbon. Common CFC refrigerants are R-11, R-12, R-13, R-113, R-114, and R-115. A blend that contains a CFC and any other product is still considered a CFC refrigerant.
What two gases have replaced CFCs
Explanation: The Chlorofluorocarbons,i.e., are replaced by Hydro Fluorocarbons(HFC) and Hydrochlorofluorocarbons (HCFCs).
Are CFCs still used in refrigerators
The CFC that is used in refrigerators is freon. It used to be used almost exclusively because it provided a stable way to keep the fridge and freezer cold. But, freon is not used in modern refrigerators.
What are the 7 greenhouse gases
What are the types of greenhouse gasesCarbon dioxide (CO2)Methane (CH4)Nitrous oxide (N2O)Industrial gases: Hydrofluorocarbons (HFCs) Perfluorocarbons (PFCs) Sulfur hexafluoride (SF6) Nitrogen trifluoride (NF3)
What are the 5 main CFCs
The 5 main CFCs include CFC-11 (trichlorofluoromethane – CFCl3), CFC-12 (dichloro-difluoromethane – CF2Cl2), CFC-113 (trichloro-trifluoroethane – C2F3Cl3), CFC-114 (dichloro-tetrfluoroethane – C2F4Cl2), and CFC-115 (chloropentafluoroethane – C2F5Cl).
Is R-22 refrigerant a CFC
Freon is DuPont's commercial name for R22, a member of the chlorofluorocarbon (CFC) organic compounds that contains carbon, chlorine, hydrogen and fluorine. CFCs are produced as a volatile derivative of methane and ethane.
Is R-22 a kind of CFC refrigerant
R-22 is an HCFC refrigerant that is often used in air-conditioning equipment. To protect the Earth's protective ozone layer, the United States is phasing out R-22, along with other chemicals.
Is CFC gas still used today
CFCs have been gradually phased out since the Montreal Protocol was adopted in 1987. At the very least, emissions should have dropped since production and consumption of the chemicals was completely banned in 2010.
Is CFC gas still being used
Despite the ban, however, some CFCs are still being emitted into the atmosphere. Emissions of a gas known as CFC-11 increased by around a quarter between 2012 and 2018, which was later attributed to it still being used for home insulation.
What replaced CFCs in refrigerators
Hydrochlorofluorocarbons such as CF3CHCl2 and hydrofluorocarbons such as CF3CH2F are the substitutes for CFCs. They can be used as refregerant and are non-ozone depleting.
Are CFCs still used in Styrofoam
Nowadays, many manufacturers label their polystyrene foam containers being CFC-free as it has been replaced with hydro CFC (HCFC), which is less damaging to the ozone layer. Still, HCFC is still damaging.
What are the 3 worst greenhouse gases
Earth's greenhouse gases trap heat in the atmosphere and warm the planet. The main gases responsible for the greenhouse effect include carbon dioxide, methane, nitrous oxide, and water vapor.
What are the 4 worst greenhouse gases
But what if you are forced to wear it in summers, that too without an air conditioner No one will like that. These greenhouse gases mainly include carbon dioxide, methane, nitrous oxide and fluorinated gases.
Are CFCs still used in air conditioners
Production of CFCs completely ceased in 1995 and all new products do not use CFCs. Very old air conditioning units may still contain CFCs and can be replaced with newer, earth-friendly models by your local air conditioning specialist.
Is 410A refrigerant a CFC
R-22, commonly known by the brand name Freon, is a chlorofluorocarbon (CFC), while R-410A is not. As National Geographic explains in their article “The Facts of Ozone Depletion,” CFCs are the chemicals most responsible for damaging the earth's ozone layer over the past several decades.
Is R134A a CFC
R134a is also known as Tetrafluoroethane (CF3CH2F) from the family of HFC refrigerant. With the discovery of the damaging effect of CFCs and HCFCs refrigerants to the ozone layer, the HFC family of refrigerant has been widely used as their replacement.
Is R 134a a CFC
R134a is also known as Tetrafluoroethane (CF3CH2F) from the family of HFC refrigerant. With the discovery of the damaging effect of CFCs and HCFCs refrigerants to the ozone layer, the HFC family of refrigerant has been widely used as their replacement.
Which two gases have replaced CFCs
Explanation: The Chlorofluorocarbons,i.e., are replaced by Hydro Fluorocarbons(HFC) and Hydrochlorofluorocarbons (HCFCs).
When was CFC banned in USA
The HCFC ban is effective January 1, 1994. The CFC ban is effective January 17, 1994. After those dates, no person may distribute or sell such products in interstate commerce, including import and export of banned products. There is no ban on use of products already in the hands of users.
When did US ban CFC
The HCFC ban is effective January 1, 1994. The CFC ban is effective January 17, 1994. After those dates, no person may distribute or sell such products in interstate commerce, including import and export of banned products. There is no ban on use of products already in the hands of users.
Is CFC still used today
The concentrations of some ozone-depleting chlorofluorocarbons (CFCs) in the atmosphere are increasing rapidly, scientists warn, despite the production of these chemicals having been banned globally since 2010.
Do refrigerators still release CFCs
CFCs are not recommended to be used in refrigerators because they deplete ozone.
