Where do we see exothermic and endothermic reactions in the real world?

Another simple example of an exothermic reaction is combustion, such as lighting a candle. An initial input of energy causes oxygen and wax react to produce carbon dioxide, water, and heat.

Exothermic:

-making ice cubes

-formation of snow in clouds

-rusting iron

-burning sugar

Endothermic:

-melting ice cubes

-evaporation of water

-cooking an egg

-baking bread