The reaction 2NO + O 2 $\to$ 2NO 2 obeys the rate law - = k obsd [NO] 2 [O 2 ]. Which of the following mechanisms is consistent with the experimental rate law?

The rate law for the given reaction shows first-order dependence on [NO] and first-order dependence on [O 2 ], indicating a bimolecular reaction involving both NO and O 2 in the rate-determining step. Option B shows a slow step involving the reactants NO and O 2 forming an intermediate NO 3 , which is consistent with the rate law. The fast step involves the intermediate NO 3 reacting with NO to form the product. The other options either do not show a bimolecular reaction or do not have a step consistent with the rate law.

The reaction 2NO + O 2 $\to$ 2NO 2 obeys the rate law - = k obsd [NO] 2 [O 2 ]. Which of the following mechanisms is consistent with the experimental rate law?

The rate law for the given reaction shows first-order dependence on [NO] and first-order dependence on [O 2 ], indicating a bimolecular reaction involving both NO and O 2 in the rate-determining step. Option B shows a slow step involving the reactants NO and O 2 forming an intermediate NO 3 , which is consistent with the rate law. The fast step involves the intermediate NO 3 reacting with NO to form the product. The other options either do not show a bimolecular reaction or do not have a step consistent with the rate law.

Solved

The Reaction 2NO + O₂ $\to$ 2NO₂ Obeys the Rate Law - = K_obsd[NO]²[O₂]

Question 83

Multiple Choice

The reaction 2NO + O₂ $\to$ 2NO₂ obeys the rate law - $The reaction 2NO + O2 \to 2NO2 obeys the rate law - = kobsd[NO]2[O2]. Which of the following mechanisms is consistent with the experimental rate law? A) NO + NO \to N2O2 (slow) N2O2 + O2 \to 2NO2 (fast) B) NO + O2 NO3 (fast equilibrium) NO3 + NO \to 2NO2 (slow) C) 2NO N2O2 (fast equilibrium) N2O2 \to NO2 + O (slow) NO + O \to NO2 (fast) D) O2 + O2 \to O2 + O2 (slow) O2 + NO \to NO2 + O (fast) O + NO \to NO2 (fast) E) none of these$ = k_obsd[NO]²[O₂]. Which of the following mechanisms is consistent with the experimental rate law?

A) NO + NO $\to$ N₂O₂ (slow) N₂O₂ + O₂ $\to$ 2NO₂ (fast)
B) NO + O₂ $The reaction 2NO + O2 \to 2NO2 obeys the rate law - = kobsd[NO]2[O2]. Which of the following mechanisms is consistent with the experimental rate law? A) NO + NO \to N2O2 (slow) N2O2 + O2 \to 2NO2 (fast) B) NO + O2 NO3 (fast equilibrium) NO3 + NO \to 2NO2 (slow) C) 2NO N2O2 (fast equilibrium) N2O2 \to NO2 + O (slow) NO + O \to NO2 (fast) D) O2 + O2 \to O2 + O2 (slow) O2 + NO \to NO2 + O (fast) O + NO \to NO2 (fast) E) none of these$ NO₃ (fast equilibrium) NO₃ + NO $\to$ 2NO₂ (slow)
C) 2NO $The reaction 2NO + O2 \to 2NO2 obeys the rate law - = kobsd[NO]2[O2]. Which of the following mechanisms is consistent with the experimental rate law? A) NO + NO \to N2O2 (slow) N2O2 + O2 \to 2NO2 (fast) B) NO + O2 NO3 (fast equilibrium) NO3 + NO \to 2NO2 (slow) C) 2NO N2O2 (fast equilibrium) N2O2 \to NO2 + O (slow) NO + O \to NO2 (fast) D) O2 + O2 \to O2 + O2 (slow) O2 + NO \to NO2 + O (fast) O + NO \to NO2 (fast) E) none of these$ N₂O₂ (fast equilibrium) N₂O₂ $\to$ NO₂ + O (slow) NO + O $\to$ NO₂ (fast)
D) O₂ + O₂ $\to$ O₂ + O₂ (slow) O₂ + NO $\to$ NO₂ + O (fast) O + NO $\to$ NO₂ (fast)
E) none of these

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The Reaction 2NO + O2 →\to→ 2NO2 Obeys the Rate Law - = Kobsd[NO]2[O2]

The Reaction 2NO + O₂ $\to$ 2NO₂ Obeys the Rate Law - = K_obsd[NO]²[O₂]