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Thomas Midgley


Why were CFCs developed? non toxic refrigerant for household appliances.
Problems with the previous gases toxic, caused people to die in their sleep. (ammonia, chloromethane)
Why were CFCs so popular? non toxic and not flammable
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.
What were CFCs orginally used for? solvents, blowing agents, refrigerants, propellants
Alternatives to CFCs hydrofluroalkanes (HFCs) hydroflurohydrocarbons (HCFCs)
Why are these only a short term solution? Present 1/10th of the damage of CFCs so serious damage is still being caused.
What are refrigerator gases and propellants alternatives? based hydrocarbons eg butane but are still flammable.
Created by: 07blandforderin