The enthalpy of formation of ammonia gas...

The enthalpy of formation of ammonia gas at 298 K is -46.11kJ `mol^-1`. The equation to which this value related is:

`1/2N_2(g)+3/2H_2(g)rarrNH_3(g)`

`N(g)+3H(g)rarrNH_3(g)`

`N_2(g)+3H_2(g)rarr2NH_3(g)`

`1/2N_2(g)+3/2H_2(g)rarrNH_3(l)`

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