In the catalytic oxidation of ammonia: , the rate of appearance of is measured to be . What is the p — Chemical Kinetics Chemistry Question
Question
In the catalytic oxidation of ammonia: $4NH_3(g) + 5O_2(g) \rightarrow 4NO(g) + 6H_2O(g)$, the rate of appearance of $NO$ is measured to be $1.08 \times 10^{-2} \text{ mol L}^{-1}\text{s}^{-1}$. What is the precise rate of disappearance of $O_2$ under the same conditions?
Answer: B
💡 Solution & Explanation
From reaction stoichiometry, $-\frac{1}{5}\frac{d[O_2]}{dt} = \frac{1}{4}\frac{d[NO]}{dt}$. Thus, the rate of disappearance of $O_2$ is $\frac{5}{4} \times 1.08 \times 10^{-2} = 1.35 \times 10^{-2} \text{ mol L}^{-1}\text{s}^{-1}$.
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