Answer the following questions:
 
1. What does one mean by exothermic reactions? Give example.
 
A chemical reaction that release energy in the form of is called an exothermic reaction.
Example: + heat
 
2. Provide one balanced chemical equation for each of the following types of decomposition reactions: Thermal, photolytic, and electrolytic.
 
Decomposition reaction using heat: 

Decomposition reaction using light: 

Decomposition reaction using electricity: