Enthalpy of neutralization of the reaction between and is –13.2 kcal/eq and that of the reaction between and is –13.7 kcal/eq. The enthalpy of dissociation of is

Question

Enthalpy of neutralization of the reaction between $	ext{CH}_3	ext{COOH(aq)}$ and $	ext{NaOH(aq)}$ is –13.2 kcal/eq and that of the reaction between $	ext{H}_2	ext{SO}_4	ext{(aq)}$ and $	ext{KOH(aq)}$ is –13.7 kcal/eq. The enthalpy of dissociation of $	ext{CH}_3	ext{COOH(aq)}$ is

Prashant Kotian · Accepted Answer

Correct answer: B. The neutralization of a strong acid/strong base yields –13.7 kcal/eq. The weak acid yields less heat (–13.2 kcal/eq). The difference is the endothermic heat consumed to dissociate the weak acid: .

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