In an exothermic reaction heat is released by a chemical reaction. In an endothermic reaction heat is absorbed by a chemical reaction.
The reaction between ammonium nitrate and water absorbs heat from the surrounding environment. Endothermic Reaction
Three drops of concentrated sulfuric acid added to 100 milliliters of water in a beaker makes the beaker hot. Exothermic Reaction
Ammonium chloride dissolved in a beaker of water makes the beaker cold. Endothermic Reaction
Uranium atoms are split to produce nuclear energy. Exothermic Reaction
Water separates into hydrogen and oxygen when an electric current is run through it. Endothermic Reaction
Methane and oxygen are combined to produce methanol and heat. Exothermic Reaction
