Question

Heat of Neutralisation of strong Acid and strong base is $-57KJ$. The amount of heat released when $0.5mole$ of $HN{O}_3$ solution is added to $0.2mole$ of $NaOH$ solution is

• A. 11.40 KJ
• B. 57 KJ
• C. 28.5 KJ
• D. 34.9 KJ

Answer 1

The correct option is A

11.40 KJ

Here $0.2mole$ of $NaOH$ is limiting Regent. So, neutralisation of one mole of $NaOH$ release heat = $57KJ$.

Neutralisation of $0.2mole$ of $NaOH$ release heat = $57\times 0.2$ = $11.40KJ$.