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? asked in 社會與文化語言 · 1 decade ago

化學反應速率問題~贈點20

* The reaction,2NO(g) + O2(g) -> 2NO(g),has the following mechanism

2NO <-> N2O2 (fast step)

What would be the rate law for this reaction?

(A) rate=k[NO]

(B) rate=k[O2]

(C) rate=k[NO][O2]

(D) rate=k[NO]^2

(E) rate=k[NO2]^2[O2]

*The reaction CHCl3(g) + Cl2(g) -> CCl4(g) + HCl(g) has been proposed to occur by the mechanism

Cl2<->(上k1,下k-1) 2Cl fast equilibrium

CHCl3 + Cl<->(上k2) HCl + CCl3 slow step

CCl3 + Cl<->(上k3) CCl4 very fast equilibrium

The overall experimental rate law which is consistent with this mechanism?

(A) rate=k1[Cl2]

(B) rate=k2[CHCl3][Cl]

(C) rate=k3[CCl3][Cl2]

(D) rate=kexp[CHCl3][Cl2]

(E) rate=k2keq^1/2[CHCl3][Cl2]^1/2

Update:

Ans:

第一題(E)

第二題(E)

1 Answer

Rating
  • 1 decade ago
    Favorite Answer

    ? reaction?2NO(g) + O2(g)?? 2NO(g)?has 以下機制2NO??? N2.O2 (快速的步) 什麼會是率法律為這反應? (a) rate=k[NO ] (b) rate=k[O2 ] (c) rate=k[NO][O2 ] (d) rate=k[NO]^2 (e) rate=k[NO2]^2[O2 ]

    ?The 反應CHCl3(g) + Cl2(g)?? CCl4(g) + HCl(g) 由機制Cl2???(?k1??k-1) 2Cl 平衡提議快速地發生CHCl3 + Cl???(?k2)

    HCl + CCl3 緩慢的步CCl3 + Cl???(?k3) CCl4 非常快速的平衡與這個機制是一致的整體實驗性率法律? (a) rate=k1[Cl2 ] (b) rate=k2[CHCl3][Cl ] (c) rate=k3[CCl3][Cl2 ] (d) rate=kexp[CHCl3][Cl2 ] (e) rate=k2keq^1/2[CHCl3][Cl2]^1/2

    查到就是這樣

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