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A possible mechanism for the overall reaction br2 (g) + 2no (g) ā†’ 2nobr (g) is no (g) + br2 (g) nobr2 (g) (fast) nobr2 (g) + no (g) k2ā†’ 2nobr (slow) the rate law for formation of nobr based on this mechanism is rate = ________. a possible mechanism for the overall reaction br2 (g) + 2no (g) 2nobr (g) is no (g) + br2 (g) nobr2 (g) (fast) nobr2 (g) + no (g) 2nobr (slow) the rate law for formation of nobr based on this mechanism is rate = ________. k1[br2]1/2 (k2k1/k-1)[no][br2]2 (k1/k-1)2[no]2 k1[no]1/2 (k2k1/k-1)[no]2[br2]

Respuesta :

ChemistryHelper2024
The overall reaction is:
Brā‚‚(g) + 2 NO(g)Ā ā†” 2 NOBr(g)
rate law = k [Brā‚‚][NO]Ā²

The first step of the overall reaction is:
NO(g) + Brā‚‚(g)Ā  Ā Kā‚ā‡„ā‡„K-1Ā  NOBrā‚‚(g)
rate law 1 = kā‚ [Brā‚‚][NO] orĀ 
rate law 2 = k-1 [NOBrā‚‚]

The second step of the overall reaction is:
NOBrā‚‚(g) + NO(g)Ā Ā ā†’Kā‚‚ā†’ 2 NOBr
rate law 3 = kā‚‚[NOBrā‚‚][NO]

So, rate law of overall reaction can be obtained as follows:
(rate law 1)*(rate law 3) / (rate law 2)
= [(kā‚[Brā‚‚][NO])* (Kā‚‚[NOBrā‚‚][NO])] / kā‚‹ā‚[NOBrā‚‚]
= [kā‚kā‚‚/kā‚‹ā‚][NO]Ā²[Brā‚‚]
So the correct answer is:
[kā‚kā‚‚/kā‚‹ā‚][NO]Ā² [Brā‚‚]

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