1. Apart from burning
for energy there are other everyday situations involving
.
2. These reactions release lots of heat
and are described as
reactions.
3. For example the composition of a match head mixture is shown in the table below.
| component | symbol/formula |
| potassium chlorate | KClO3 | |
| sulfur | S |
| carbon | C |
The
supplys the oxygen to burn the
to carbon dioxide and the sulfur to
.

4. Balance the symbol equations
+ O
2 ==> C
S +
2 ==>
O