Question

when we add acid or base in water it envolves so much of heat. Does it involve any chemical change?

Answer 1

If energy, in the form of heat, is liberated the reaction is exothermic and if energy is absorbed the reactionis endothermic. ... The heat (or enthalpy) of neutralization (ΔH) is theheat evolved when an acid and a base react to form a salt plus water.