The Photochemical Reactions of Chlorine with Hydrogen and with Methane
In this classic demonstration, from the Royal Society of Chemistry, shining a strong light onto a cored bottle of chlorine and hydrogen causes a rapid photochemical reaction and the bottle explodes. A less rapid reaction occurs with methane and chlorine.
The resource provides a list of apparatus and chemicals needed for the experiment, together with teaching tips.
Curriculum links include: free-radical mechanism, atmospheric chemistry, ozone.