Question

Give one example that illustrates the following characteristics of a chemical reaction:

Change in state

Answer 1

The reaction between hydrogen sulphide and chlorine (both gases) produces sulphur (solid) and hydrogen chloride (gas).

\[\ce{\underset{Hydrogen sulphide}{H2S_{(g)}} + \underset{Chlorine}{Cl2_{(g)}}-> \underset{Hydrogen chloride}{2HCl_{(g)}} + \underset{(yellow solid)}{\underset{Sulphur}{S_{(s)}}}}\]