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The heat of neutralisation of strong dibasic acid in dilute solution by NaOH is nearly

The heat of neutralisation of strong dibasic acid in dilute solution by NaOH is nearly

Grade:12

2 Answers

Ramesh V
70 Points
14 years ago

The values obtained were: for  H2SO4-NaOH, is  13.48  k.cal. per gm-equiv. and 

for HCI-NaOH,  13.523  kcal.  per gm-equiv.

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regards

Ramesh

Ashwani Dubey
17 Points
5 years ago
Valency factor of NaOH = 1
Valency factor of dibasic acid = 2
Thus only 1 gram equivalent of dibasic acid is neutralised by 1 gram equivalent of NaOH.
As we know that, for the reaction-
$$\underset{\text{acid}}{{H}^{+}} + \underset{\text{base}}{{OH}^{-}} \longrightarrow {H}_{2}O; \quad \quad \Delta{H} = -13.7 \; {KJ}/{mol}$$
Hence the heat of neutralisation of a strong dibasic acid in dilute solution by NaOH is -13.7 kcal/mol.

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