What are some CFC examples?
An example of a refrigerant CFC is dichlorodifluoromethane, CF2Cl2 (also known as CFC-12), which boils at -30°C. Another once-common CFC is trichlorofluoromethane, CFCl3 (CFC-11), which boils at 24°C and was once the propellant in around half of all the aerosol cans used in the world.
How does CFC affect the environment?
Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons destroy the earth’s protective ozone layer, which shields the earth from harmful ultraviolet (UV-B) rays generated from the sun. CFCs and HCFCs also warm the lower atmosphere of the earth, changing global climate.
What 3 things are CFCs found in?
Chlorofluorocarbons (CFCs) are anthropogenic compounds that have been released into the atmosphere since the 1930s in various applications such as in air-conditioning, refrigeration, blowing agents in foams, insulations and packing materials, propellants in aerosol cans, and as solvents.
How do you write CFCs?
CFCs are halocarbons that contain only the elements carbon, chlorine, and fluorine. The most common CFCs are small molecules containing only one or two carbon atoms. For example, a common refrigerant has the chemical formula of CCl2 F2 , which in industry-invented shorthand is known as CFC-12.
What are examples of CFCs quizlet?
(CFC) Organic compounds made up of atoms of carbon, chlorine, and fluorine. An example is Freon -12 (CCl2F2), which is used as a refrigerant in refrigerators and air conditioners and in making plastics such as Styrofoam.
Why chlorofluorocarbon is used in refrigerator?
They have an exceptionally high heat capacity which makes them effective in the refrigeration process. CFCs were chosen in the 1920s and 30s to replace other chemical refrigerants toxic to humans like ammonia and methyl chloride.
What human activities cause CFCs?
The most common source of CFCs are refrigerants, but fire suppression systems for aircraft and aerosols also emit CFCs into the atmosphere.
- Refrigerators and Air Conditioners. The most common emitter of CFCs are refrigerants, particularly those used after the 1930s.
- Aircraft Halon.
- Aerosol Sprays.
- Rogue CFCs.
Do CFCs smell?
Chlorofluorocarbons are more commonly known as CFCs and have been used as refrigerants, propellants (in aerosol applications), and solvents. CFCs are colourless, volatile, toxic liquids and gases with a faintly sweet ethereal odour.
What were common uses of CFCs?
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.
How do you find a CFC number?
For CFC-11: 90 + 11 = 101, so the number of carbon atoms is 1, the number of hydrogen atoms is zero, the number of fluorine atoms is 1, and the number of chlorine atoms is (2 + 2 – 0 – 1 = 3). So the chemical formula for CFC-11 is CFCl3. That is, it has 1 carbon atom, no hydrogen, 1 fluorine atom, and 3 chlorine atoms.
Why do we use CFCs?
