A Proposed Mechanism for the Reaction 2 NO(g) + 2H₂(g) $\rightarrow$

question 150

Multiple Choice

A proposed mechanism for the reaction 2 NO(g) + 2H₂(g) $\rightarrow$ N₂(g) + 2 H₂O(g) is:
Step 1: 2 NO(g) $\rightarrow$ N₂O₂(g) (very fast, reversible)
Step 2: N₂O₂ (g) + H₂ (g) $\rightarrow$ N₂O(g) + H₂O(g) (slow)
Step 3: N₂O(g) +H₂(g) $\rightarrow$ N₂(g) +H₂O(g) (fast) What is the rate law for the overall reaction?

• A)k[NO]/[N₂O₂]
• B)k[N₂O][H₂]
• C)k[NO]²
• D)k[NO]^1/2[H₂]
• E)k[NO]²[H₂]

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