The enthalpy of neutralization of oxitic 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_(@)O_(4)^(2-)` is

Options

A. `1.0 kcal mol^(-1)`
B. `2.0 kcal mol^(-1)`
C. `18.55 kcal mol^(-1)`
D. `11.7 kcal mol^(-1)`

Answer

B

Explanation

Enthalpy of dissociation of oxalic acid
`=` Heat of neutralization of a strong acid with a strong base `-` Heat of neutralization of oxalic acid with a strong base
`=-25.4 kcal mol^(-1) -(-2xx13.7 kcal mol^(-1))`
`=-2.0 k cal mol^(-1)`