hce_kmu
114年
物理及化學
第 73 題
The balanced equation for the reaction of the gases nitrogen dioxide and fluorine is
2NO$_{2(g)}$ + F$_{2(g)}$ $\rightarrow$ 2NO$_2$F$_{(g)}$ (rate constant: $k$)
A suggested mechanism for this reaction is
NO$_{2(g)}$ + F$_{2(g)}$ $\rightarrow$ NO$_2$F$_{(g)}$ + F$_{(g)}$ (rate constant: $k_1$)
F$_{(g)}$ + NO$_{2(g)}$ $\rightarrow$ NO$_2$F$_{(g)}$ (rate constant: $k_2$)
If the first step is the rate-determining step, which of the following expressions correctly represents the rate law?
2NO$_{2(g)}$ + F$_{2(g)}$ $\rightarrow$ 2NO$_2$F$_{(g)}$ (rate constant: $k$)
A suggested mechanism for this reaction is
NO$_{2(g)}$ + F$_{2(g)}$ $\rightarrow$ NO$_2$F$_{(g)}$ + F$_{(g)}$ (rate constant: $k_1$)
F$_{(g)}$ + NO$_{2(g)}$ $\rightarrow$ NO$_2$F$_{(g)}$ (rate constant: $k_2$)
If the first step is the rate-determining step, which of the following expressions correctly represents the rate law?
- A Rate= $k [\text{NO}_2]^2[\text{F}_2]$
- B Rate= $k [\text{NO}_2][\text{F}_2]$
- C Rate= $k_2 [\text{NO}_2][\text{F}]$
- D Rate= $k_1 [\text{NO}_2][\text{F}_2]$
- E None of the above.
思路引導 VIP
如果一條生產線由多個先後相連的工位組成，有些工位處理零件極快，但其中有一個工位動作特別緩慢。請問，這條生產線最終產出產品的總速率，會受限於哪一個工位的表現？對應到化學反應的步驟，我們應該選取哪一部分的化學物質來列出速率式呢？