Enthalpy of neutralization of oxalic acid is -25.4 kcal/mol using strong base, . Enthalpy change for the process: H2C2O4(aq) - 2H+(aq) + C2O4^2-(aq) is about

Question

Enthalpy of neutralization of oxalic acid is -25.4 kcal/mol using strong base, $NaOH$. Enthalpy change for the process: H2C2O4(aq) -> 2H+(aq) + C2O4^2-(aq) is about

Prashant Kotian · Accepted Answer

Correct answer: A. The enthalpy of neutralization of a strong acid and strong base is -13.7 kcal/eq, which is -27.4 kcal/mol for a dibasic acid. Since oxalic acid is weak, some heat is absorbed for its dissociation. Enthalpy of dissociation = δ H_observed - δ H_theoretical = -25.4 - (-27.4) = +2.0 kcal/mol.

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