Here is a reaction: N₂(g) + 3 H₂(g) → 2 NH₃(g).

If the rate of formation of ammonia is 0.272 M.s^-1, what is the rate of disappearance of H₂?

Question

Here is a reaction: N₂(g) + 3 H₂(g) → 2 NH₃(g).

If the rate of formation of ammonia is 0.272 M.s^-1, what is the rate of disappearance of H₂?

| General Chemistry 2

Accepted Answer

rate of the reaction = - $\frac{1}{3} \frac{∆ [H_{2}]}{∆ t}$ = $\frac{1}{2} \frac{∆ [{NH}_{3}]}{∆ t}$

rate of formation of NH₃ =

\frac{∆ [{NH}_{3}]}{∆ t}

rate of disappearance of H₂ = -

\frac{∆ [H_{2}]}{∆ t}

⇒ rate of disappearance of H₂ =

\frac{3}{2}

x rate of formation of NH₃

⇒ rate of disappearance of H₂= x 0.272 = 0.408 M.s^-1

Reaction rates | Chemical Kinetics: Rate Laws