Enthalpy of neutralisation of acetic acid by NaOH is - 50.6 ,kJ/m… - Vidyadip

MCQ

Enthalpy of neutralisation of acetic acid by $NaOH$ is $ - 50.6\,kJ/mol.$ and the heat of neutralisation of a strong acid with a strong base is $-55.9\, kJ/mol.$ What is the value of $\Delta H$ for the ionisation of $C{H_3}COOH$....$kJ/mol$

✓
$+ 5.3$
B
$+ 6.2$
C
$+ 8.2$
D
$+ 9.3$

✓

Answer

Correct option: A.

$+ 5.3$

(a)$\Delta H = \,\Delta {H_{{\rm{ioniz}}}} + \Delta {H_{{\rm{n}}eu}}$ = $ - \,50.6\,\, = \,\Delta {H_{{\rm{ioniz}}}} + ( - 55.9)$
$\Delta {H_{{\rm{ioniz}}}} = + \,5.3\,kJ/mol$.

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