Final answer:
An exothermic reaction is a chemical reaction that releases energy in the form of heat. The energy of the products is lower than the energy of the reactants, resulting in energy being given off. The combustion of methane gas in kitchen burners is an example of an exothermic reaction.
Step-by-step explanation:
An exothermic reaction is a chemical reaction that releases energy in the form of heat. In this type of reaction, the bonds in the product have higher bond energy than the reactants. The energy of the products is lower than the energy of the reactants, resulting in energy being given off as reactants are converted to products. For example, the combustion of methane gas in kitchen burners is an exothermic reaction that releases heat.