Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because_________________?
Correct answer: C. Only OH- and H+ ions react in every case
- A. The strong base and strong acid reacts completely
- B. The salt formed does not hydrolyse
- C. Only OH- and H+ ions react in every case
- D. The strong base and strong acid reacts in aqueous solution
Explanation
For a strong acid and strong base, both electrolytes ionise completely, so the net reaction is always H+ + OH− → H2O. The spectator ions do not affect this heat, making option c the reason for the constant value.
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