Why are CFCs good?

Why are CFCs good?

These compounds are non-flammable, tasteless and odourless, and chemically stable. Their other important property is their volatility, having boiling points close to zero degrees Centigrade. These physical properties make them ideal for use as refrigerant gases in air conditioners, freezers and refrigerators.

What are CFCs how are they responsible for?

CFCs are synthetic harmful chemicals which are mainly responsible for ozone layer depletion. CFCs release chlorine atoms which break ozone to oxygen. More amounts of CFCs thus released will cause depletion of ozone layer.

What is used in place of CFC?

hydrochlorofluorocarbons
Two of the chemical classes under consideration for replacing CFCs are hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs).

How does CFCs destroy the 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. When sunlight returns in the spring, the chlorine begins to destroy ozone.

What do CFCs stand for?

chlorofluorocarbons
Hint: CFCs stand for chlorofluorocarbons. These are nonflammable chemicals which are used as refrigerants, in manufacturing of aerosols, etc. These are considered pollutants as they destroy the protective ozone layer and are responsible for increasing temperature conditions leading to global warming.

Why are CFCs used in refrigerators?

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.

Why are CFCs used in aerosols?

Chlorofluorocarbons (CFCs), including Freon, were used extensively as aerosol propellants. CFCs react with chlorine and break down, thereby destroying the ozone layer and allowing more radiation from the sun than is normal to reach the earth. Aerosol products have many uses, from hair care to cleaning and disinfecting.

What is the role of CFCs in polluting air?

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.

Why are CFCs considered pollutants?

The chlorofluorocarbons release chlorine atoms when they break down in the presence of UV radiations and thus deplete the ozone layer. The chlorine released reacts with ozone molecules and forms oxygen which reduces the ozone quantity causing its depletion. This is the reason why CFCs are considered as pollutants.

Why CFCs are are hazardous pollutants?

What are the sources of CFCs?

The most common source of CFCs are refrigerants, but fire suppression systems for aircraft and aerosols also emit CFCs into the atmosphere.

Where are CFCs found?

CFCs are generally non-reactive in the troposphere, the lowest layer of the atmosphere, but intense ultraviolet radiation in the outer layer of the atmosphere, called the stratosphere, decomposes CFCs into component molecules and atoms of chlorine.

What are CFC gases?

Definition of ‘CFC’. CFC. CFCs are gases that are used in things such as aerosols and refrigerators and can cause damage to the ozone layer. CFC is an abbreviation for ‘chlorofluorocarbon.’.