The first reaction is:
\[ 2 \mathrm{NaClO}_{3}(s) \rightarrow 2 \mathrm{NaCl}(s) + 3 \mathrm{O}_{2}(g) \]
This reaction involves the breakdown of a single compound, sodium chlorate (\(\mathrm{NaClO}_3\)), into simpler substances, sodium chloride (\(\mathrm{NaCl}\)) and oxygen gas (\(\mathrm{O}_2\)). This is characteristic of a decomposition reaction, where a single compound breaks down into two or more products.
The second reaction is:
\[ \mathrm{Fe}(s) + \mathrm{CuSO}_{4}(aq) \rightarrow \mathrm{FeSO}_{4}(aq) + \mathrm{Cu}(s) \]
In this reaction, iron (\(\mathrm{Fe}\)) displaces copper (\(\mathrm{Cu}\)) from copper(II) sulfate (\(\mathrm{CuSO}_4\)), forming iron(II) sulfate (\(\mathrm{FeSO}_4\)) and copper metal. This is a single displacement reaction, where an element displaces another element in a compound.
The third reaction is:
\[ 2 \mathrm{Li}(s) + 2 \mathrm{HCl}(aq) \rightarrow 2 \mathrm{LiCl}(aq) + \mathrm{H}_{2}(g) \]
Here, lithium (\(\mathrm{Li}\)) reacts with hydrochloric acid (\(\mathrm{HCl}\)) to form lithium chloride (\(\mathrm{LiCl}\)) and hydrogen gas (\(\mathrm{H}_2\)). This is another example of a single displacement reaction, where lithium displaces hydrogen from hydrochloric acid.
- The first reaction is a \(\boxed{\text{decomposition reaction}}\).
- The second reaction is a \(\boxed{\text{single displacement reaction}}\).
- The third reaction is a \(\boxed{\text{single displacement reaction}}\).