Define enthalpy of neutralisation?

The enthalpy of neutralization is the heat energy released or absorbed when an acid and a base react to form a salt and water in a neutralization reaction. It is the heat change that occurs when one mole of hydrogen ions from an acid reacts with one mole of hydroxide ions from a base to form one mole of water. The enthalpy of neutralization is typically exothermic, meaning heat is released during the reaction.

Enthalpy of Neutralisation is the change in enthalpy that accompanies the neutralisation of one mole of an acid by one mole of a base in a dilute solution. It is usually expressed in kilojoules per mole (kJ/mol).

The enthalpy of neutralisation is a negative value, indicating that the reaction is exothermic, meaning that heat is released when an acid and a base react. The magnitude of the enthalpy of neutralisation depends on the strength of the acid and the base involved. Stronger acids and bases typically have larger enthalpies of neutralisation.

The enthalpy of neutralisation can be used to calculate the heat released or absorbed during a neutralisation reaction. It can also be used to determine the concentration of an unknown acid or base by titration.