Question

What is an example where heating a substance provides a mixture of its constituent elements?

Answer 1

You might have to be a bit more specific, but I can give 1 example where the heating of a compound gives an elemental mixture, that of cinnabar.

Explanation:

Cinnabar is bright red mercuric sulfide. Heating decomposes this material to give mercury metal and sulfur.

`HgS(s) + Delta rarr Hg(l) + S(s)`

The mercury metal may be collected by decantation, and then redistillation.