Q. Which of the following reaction defines $\mathrm{\Delta}H_{f}^{o}$?
A) C(diamond) $+ \ O_{2}(g) \rightarrow CO_{2}(g)$
B) $\frac{1}{2}H_{2}(g) + \frac{1}{2}F(g) \rightarrow HF(g)$
C) $N_{2}(l) + 3H_{2}(g) \rightarrow 2NH_{3}(g)$
D) $CO(g) + \frac{1}{2}O_{2}(g) \rightarrow CO_{2}(g)$
Explanation
The correct answer is Option C: $N_{2}(l) + 3H_{2}(g) \rightarrow 2NH_{3}(g)$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.