Exothermic Reactions

* Condensation of rain from water vapor

* Combustion of fuels such as wood,coal and oil

* Mixing water and strong acids

* Mixing alkalis and acids

* The setting of cement and concrete

* Mixture of sodium and chlorine 

* Whenever you strike a match the friction that is caused ignites the phosphorus and potassium chlorate in the head of the match and they continue to burn with the oxygen in the air. This creates a flame, which is a definite sign that a exothermic reaction is taking place as heat and energy are bring given off due to the reaction.