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H(2)SO(4)(aq)+2NaOH((aq))to Na(2)SO(4)(a...

`H_(2)SO_(4)(aq)+2NaOH_((aq))to Na_(2)SO_(4)(aq) +2H_(2)O_((l))`. Suggest the hest of this reaction.

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For the formation of one mole of water, heat evolved = 57.3kJ. For 2 moles of water formed, heat evolved = `2 xx 57.3KJ = 114.6 kJ`. 
The heat of reaction is =-114.6 kJ .
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