The main use of chlorofluorocarbons is in __________.

The correct answer is refrigerants.

Key Points

• Chlorofluorocarbons (CFCs) are primarily used as refrigerants in air conditioning systems, refrigerators, and freezers.
• They are known for their ability to efficiently transfer heat, making them ideal for cooling applications.
• CFCs were once widely utilized due to their low toxicity, stability, and non-flammability properties.
• The most common CFC compounds used in refrigeration include CFC-11, CFC-12, and CFC-113.
• The use of CFCs in refrigerants has been significantly reduced globally due to their role in ozone layer depletion, as highlighted by the Montreal Protocol.

Additional Information

• Chlorofluorocarbons (CFCs):
  • CFCs are synthetic compounds made of chlorine, fluorine, and carbon.
  • They were first developed in the 1930s as safer alternatives to toxic refrigerants like ammonia and sulfur dioxide.
  • They are chemically inert and have long atmospheric lifetimes, contributing to their environmental impact.
• Ozone Layer Depletion:
  • CFCs release chlorine atoms in the stratosphere when exposed to UV radiation.
  • These chlorine atoms catalytically destroy ozone molecules, leading to the thinning of the ozone layer.
• Montreal Protocol:
  • It is an international treaty signed in 1987 to phase out the production and use of ozone-depleting substances, including CFCs.
  • The protocol has been successful in reducing global CFC emissions and aiding ozone layer recovery.
• Hydrofluorocarbons (HFCs):
  • HFCs are now used as replacements for CFCs in refrigeration and air conditioning systems.
  • Unlike CFCs, HFCs do not deplete the ozone layer but are potent greenhouse gases.