For the follousing cuera LL reacti on A possible mechani Sm

For the follousing cuera LL reacti on A possible mechani Sm is: 2) Heo, + Ha-42H [Rate Determina Step a) klhat is the active inter medite b Provide the rate Laus Do not Chanse Stoi chiometric cosffdets fer the oerall feaction

Solution

a)The active intermediate is H₂O₂

b)rate law=k[NO]²[H₂]

derivation

rate law from the rate determining step=k₂[H₂O₂][H₂]  

now H₂O₂ is intermediate .in the steady state approach we write the full rate law for intermediate H₂O₂ and set this to zero.

appearing of H₂O₂=disappearing of H₂O₂

K₁[NO]²=k_-1[N₂][H₂O₂]+k₂[H₂O₂][H₂]

substituting the value of H₂O₂ we get

rate=k₂k₁[NO]²[H₂]/k_-1[N₂]+k₂[H₂]

now step ii is so small and step i is fast so

k_-1>>>k2

so we can write the rate law=k[NO]²[H₂] this is the rate law