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At 25^(@)C, for the reaction, H^(+)(aq)+...

At `25^(@)C`, for the reaction, `H^(+)(aq)+OH^(-)(aq)toH_(2)O(l),DeltaH^(0)=-57.3kJ*mol^(-1)`. If the ionisation enthalpy of HCN in water by 45.2 `kJ*mol^(-1)`, then the standard heat of reaction (in `kJ*mol^(-1)`) for the reaction, `HCN(aq)+NaOH(aq)to NaCN(aq)+H_(2)O(l)`, in dilute aqueous solution is-

A

`-113.5`

B

`-12.1`

C

`-102.5`

D

`-35.7`

Text Solution

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The correct Answer is:
B
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