1. Tardigrade
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  3. Chemistry
  4. Heat of neutralization of any strong acid and strong base is always constant and Δ H= -57.3 kJ. This is because

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Q. Heat of neutralization of any strong acid and strong base is always constant and $\Delta H= -57.3 \, kJ$. This is because

COMEDKCOMEDK 2008Thermodynamics

Solution:

The enthalpy of neutralization of any strong acid with a strong base is always the same, i.e., 57.1 kJ. This is because the strong acids, strong bases and the salts they form, are all completely ionized in dilute aqueous solution.
$ Na^+ = OH^- + H^+ + Cl^- \rightarrow Na^+ + Cl^- + H_2 O$ or $ H^+_{(aq)} + OH^-_{(aq)} \rightarrow H_2O_{(l)} $
i.e.; 1 mole of water is formed from $H^+$ and $OH^-$ ions.