What is quenching heat or quenching enthalpy ?:?

What is quenching heat or quenching enthalpy ?:?
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amount of heat generated during the formation of 1 mol of water by diluting 1 mol H + of a given acid at a temperature of 25 ° C is called quenching heat or quenching enthalpy . The value of the propagation heat of all strong acids and strong bases is equal to - 57.34 kj .
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