Question

Give two examples of the following change occurring during a chemical reaction:

Change of state of the reactants

Answer 1

Chemical reaction- A chemical reaction is the change of a substance into a new one that has a different chemical identity.

• Some chemical reactions are observed by the state change of the reactants.
• Below are two examples of it.

Change of state-

• Combustion of candle wax is characterized by a change in state from solid to liquid and gas.
• Ammonia gas reacts with Hydrogen chloride gas to produce solid Ammonium chloride.
• $\underset{\mathrm{Ammonia}}{{\mathrm{NH}}_3\left(\mathrm{g}\right)}+\underset{\mathrm{Hydrogen}\mathrm{chloride}}{\mathrm{HCl}\left(\mathrm{g}\right)}\to \underset{\mathrm{Ammonium}\mathrm{chloride}}{{\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{s}\right)}$