Which of the following pairs of substances has the highest heat of neutralization?

A. strong acid and strong base
B. weak acid and weak base
C. strong acid and weak base
D. weak acid and strong base

Correct Answer:

Option A – strong acid and strong base

Explanation

In other terms, the stronger the acid the greater the amount of hydrogen ions present in the solution, and hence the more alkali that should be required to neutralise the solution, hence increasing the enthalpy