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Strong and Weak Acids and Bases

In which of t...

Question

In which of the following neutralisation reactions, the heat of neutralisation will be highest?

H C l

and

N a O H

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{C H}_{3} C O O H

and

N a O H

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{C H}_{3} C O O H

and

{N H}_{4} O H

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H C l

and

{N H}_{4} O H

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Solution

The correct option is A $H C l$ and $N a O H$
The heat of neutralisation will be highest for the reaction involving strong acid as well as strong base.
Since, $C H_{3} C O O H$ is a weak acid and $N H_{4} O H$ is a weak base so the options B,C,D will not have maximum heat of neutralisation, while in option A both $H C l$ and $N a O H$ are strong so it will have highest heat of neutralisation.
Hence, answer is option A.

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Similar questions

H C l

N a O H

N H_{4} O H

N H_{4} O H

C H_{3} C O O H

Δ H^{\circ}

C H_{3} C O O H

\begin{matrix} Column - I & Column - II (Enthalpy change in kcal) & (Neutralisation) (A) & < 13.7 kcal & (p) & H C l (1 m o l) + N a O H (1 m o l) (B) & = 13.7 kcal & (q) & H F (1 m o l) + N a O H (1 m o l) (C) & > 13.7 kcal & (r) & N H_{4} O H (1 m o l) + H C l (1 m o l) (D) & = 27.4 kcal & (s) & N a O H (2 m o l) + H_{2} S O_{4} (1 m o l) (t) & N a O H (1 m o l) + C H_{3} C O O H (1 m o l) \end{matrix}

N H_{4} O H

C H_{3} C O O H

m o l^{- 1}

C H_{3} C O O H

m o l^{- 1}

N H_{4} O H

H C l

N a O H

13.7 k c a l {e q}^{- 1}

{C H}_{3} C O O H

k c a l

{m o l}^{- 1}

11.7 k c a l {e q}^{- 1}

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