In which of the following process of neutralization is the magnitude of `Delta H_("neutralization")` less than that of `Delta H_("ionization") of water ?

Options

A. `HCl + NaOH`
B. `H_(2) SO_(4) + NaOH`
C. `CH_(2) CHOOH + NaOH`
D. `HClO_(4) + KOH`

Answer

C

Explanation

`Delta_(ion H` for water is the enthalpy change for the following process:
`H_(2) O (1) rarr H^(+) (aq.) + OH^(-) (aq.)`
It is just reverse of neutralization of a weak acid by strong base, less energy (heat) is released than during the neutralization of a strong acid by a strong base, `Delta H` neutralization is less than that of `Delta H_("ionization")` for `CH_(3) COOH + NaOH`.