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The enthalpy of neutralisation of 'NaOH'...

The enthalpy of neutralisation of 'NaOH' with 'HCl' is '57.1 kJ' while with 'CH_3COOH', it is '-55 kJ' This happens because

A

acetic'acid is an organic acid

B

acetic acid is little soluble in water

C

acetic acid is a weak acid and requires lesser sodium hydroxide for neutralisation

D

some heat, is required to ionise acetic acid completely

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The correct Answer is:
D
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