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Bond energies of N -= N H-H, N - H are r...

Bond energies of `N -= N` H-H, `N - H` are respectively `x_1 , x_2, x` and X_3 `kJ mol^(-1)` . Hence, `DeltaH_(f)^(@)(NH_3)` is:

A

`x_1+3x_2-x_3`

B

`x_1+x_2-x_3`

C

`x_(1/2)+3/2x_2-3x_3`

D

`x_1+3x_2-6x_3`

Text Solution

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The correct Answer is:
C
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