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The standard enthalpy of formation of NH...

The standard enthalpy of formation of `NH_(3)` is `-46.0KJ mol^(-1)` . If the enthalpy of formation of `H_(2)` from its atoms is `-436KJ mol^(-1)` and that of `N_(2)` is `-712KJ mol^(-1)` , the average bond enthalpy of `N-H` bond in `NH_(3)` is

A

`-964kJmol^(-1)`

B

`+352kJmol^(-1)`

C

`+1056kJmol^(-1)`

D

`-1102kJmol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`N_(2)+3H_(2)rarr2NH_(3)`
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