Editor
Enthalpy of neutralization of all the strong acids and strong bases has the same value because:
Difficulty: Easy
A: 
Strong acids and bases are ionic substances.
B: 
Neutralization leads to the formation of salt and water.
C: 
The net chemical change involves the combination of $H^{+}$ and $OH^{-}$ ions to form water.
D: 
Acids always give rise to $H^{+}$ ions and bases always flourish $OH^{-}$ ions.