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Bond energy of N-H,H-H and N-=N are a,b,...

Bond energy of `N-H,H-H` and `N-=N` are `a,b,c` respectively. The `Deltah` for the reaction,
`2NH_(3) rarr N_(2)+3H_(2)` is `:`

A

`6a - 3b -c`

B

`6a + 3b + c`

C

`a + 6b -c`

D

`6a + b -3c`

Text Solution

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The correct Answer is:
A
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