The enthalpy of neutralization of oxalic acid by strong acid is `- 25.4 kcal mol^(-1)`. The enthalpy of neutralization of strong acid and strong base is `-13.7 kcal equil^(-1)`. The enthalpy of dissociation of
`H_(2)C_(2)O_(4)hArr2H^(+)+C_(2)O_(4)^(2-)` is

Options

A. 1 kcal `mol^(-1)`
B. 2 kcal `mol^-1`
C. 18.55 kcal `mol^(-1)`
D. 11.7 kcal `mol^(-1)`

Answer

B

Explanation

Oxalic acid is dibasic acid hence expected heat of neutralization will be `(2xx-13.7kcal)`.
The dissociation energy of oxalic acid `2xx13.7-25.4`
`=2" kcal "mol^(-1)`