Reactions in which energy is absorbed, usually in the form of heat are known as
Endothermic
Endothermic reactions are reactions in which reactants absorb energy from their surroundings to form products.
The neutralisation reaction is a reaction in which acids react with water to give salt and water.
A photochemical reaction, a chemical reaction initiated by the absorption of energy in the form of light.
Exothermic reactions are reactions in which energy is released in the surroundings along with the products.