Neutralization Heat - Chuwanetsu

This is the heat released when an acid and a base are neutralized. It is usually expressed as the amount of heat when there is 1 mole of each of them. When both are a strong acid and a strong base and are sufficiently dilute, they are considered to be completely dissociated, so the neutralization is a reaction that produces H ₂ O from H ⁺ and OH ^- , and regardless of the type of acid and base, the heat of neutralization is 56.5 kJ mol ^-1 (13.5 kcal mol ^-1 ) (25 °C).

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

酸と塩基が中和するときに放出される熱．通常，両者が1モル量ずつのときの熱量で表される．両者が強酸と強塩基であり，かつ十分に希薄なときは，これらは完全に解離しているとみなされるから，中和は H^＋ とOH^－からH₂Oを生じる反応となり，酸と塩基の種類に無関係に，中和熱は56.5 kJ mol^－1(13.5 kcal mol^－1)(25 ℃)となる．

出典　森北出版「化学辞典（第2版）」化学辞典 第2版について　情報