Some liquid products are sold in aerosol cans. Gas is stored in a gas out of the can. Explain why an aerosol can should never be thrown into a fireplace or incinerator.

The aerosol can is sealed, and under pressure. Place it on a heat source, and the gas inside expands. Upon expansion with no outlet, the vessel may explode.

Pressure cookers work on this principle, as food can be cooked at higher temperatures than

100

∘

C

. Pressure cookers have safety valves, that will operate if the internal pressure becomes too high.