Question

Explain why, explosion of a firework (such as a cracker) is a chemical change.

Answer 1

A chemical change is a change that is irreversible i.e. original substance cannot be recovered after the change occurs. Also, new substances are formed in a chemical change, with the evolution of energy in some cases.

• The explosion of fireworks such as a cracker releases a lot of energy with the evolution of heat, light, and sound along with the production of gaseous products.
• The original substance cannot be recovered after the explosion occurs, Hence this is a chemical change.