Chemistry - Chemical Kinetics Question with Solution | TestHub

For the given reaction ${\text{N}}_2(g)+3{\text{H}}_2(g)\to 2{\text{NH}}_3(g)$, the rate of reaction is expressed as:

$\text{Rate}=-\frac{d[{\text{N}}_2]}{dt}=-\frac{1}{3}\frac{d[{\text{H}}_2]}{dt}=+\frac{1}{2}\frac{d[{\text{NH}}_3]}{dt}$

Here, $-\frac{d[{\text{N}}_2]}{dt}$ represents the rate of consumption of ${\text{N}}_2$.

Therefore, the rate of reaction is equal to the rate of consumption of ${\text{N}}_2$.

Answer: the rate of consumption of ${\text{N}}_2$.