Which of the following reactions represe...

Which of the following reactions represents `DeltaH_f^@`

A

`C _(("diamond"))+ O _(2 (g)) to CO _(2 (g))`

B

`(1)/(2) H _(2 (g)) + (1)/(2) F _(2 (g)) to 2 NH _(3 (g))`

C

`N_(2(g)) + 3H _(2(g)) to 2 NH _(3 (g))`

D

`CO _((g)) + 1/2 O _(2(g)) to CO _(2(g)) `

Verified by Experts

The correct Answer is:

B

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