Heat of neutralisation of strong acid and strong base is constant. Why

1.	Heat of neutralisation of strong acid and strong base is constant. Why?
Answer» The enthalpy of neutralization of all strong acids and strong bases is always constant, i.e., -57.1 kJ. The explanation to this generalization can be provided on the basis of Arrhenius theory of ionization. The strong acids and strong bases are almost completely ionized in dilute aqueous solutions. The neutralization of strong acid and strong bases simply involve the combination of H⁺ ions (from acid) and OH^– ions (from base) to form water molecules. It has been found experimentally that when 1 mole of water is formed by the neutralization of 1 mole of H⁺ ions and 1 mol of OH^– in aqueous solutions, 57.1 kJ of energy is released.

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Heat of neutralisation of strong acid and strong base is constant. Why?

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