Some signs that shows that a change is chemical change during a firework explosion as regards this question are;
Light is produced
Heat is produced
- Chemical changes can be regarded as kind of change that take place when substance combines with another and at the end, there is formation of new products.
- It could be a decomposition reaction, this could be during explosion and it is usually involve production of heat .
- During fireworks explosion, there is a reaction between charge of gunpowder , this gunpowder is been ignited with a fuse and the ignition brings spark, then there would be explosion.
- As the explosion occurs, energy will be released inform if heat and some gases, the presence of this heat is a sign of chemical change.
Therefore, presence of heat in form of energy is a sign for chemical changes.
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