CFCs
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Why were CFCs developed? | non toxic refrigerant for household appliances.
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Problems with the previous gases | toxic, caused people to die in their sleep. (ammonia, chloromethane)
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Why were CFCs so popular? | non toxic and not flammable
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What are the problems with CFCs | strong carbon to halogen bond, however when reaching the ozone, breaks down to form radicals which catalyst the breakdown of the ozone layer.
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What were CFCs orginally used for? | solvents, blowing agents, refrigerants, propellants
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Alternatives to CFCs | hydrofluroalkanes (HFCs)
hydroflurohydrocarbons (HCFCs)
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Why are these only a short term solution? | Present 1/10th of the damage of CFCs so serious damage is still being caused.
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What are refrigerator gases and propellants alternatives? | based hydrocarbons eg butane but are still flammable.
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