研究表明I
-可以作为水溶液中SO
2歧化反应的催化剂:3SO
2(g)+2H
2O (l)=2H
2SO
4 (aq)+S(s) ΔH<0;该过程一般通过如下步骤来实现:①SO
2(g)+4I
-(aq)+4H
+(aq)= S(s)+ 2I
2(g) + 2H
2O(l) ΔH>0;②I
2(g)+2H
2O(l)+SO
2(g)=SO
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmsubsup%3E%3Cmrow%3E%3Cmn%3E4%3C%2Fmn%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
(aq)+4H
+(aq)+2I
-(aq) ΔH<0;已知反应①为慢反应,示意图中能体现上述反应过程中能量变化的是( )
- A、
![](http://tikupic.21cnjy.com/2021/12/24/aa/eb/aaeb34cc52fd41d96f8f3f20f8615f48.png)
- B、
![](http://tikupic.21cnjy.com/2021/12/24/c1/f9/c1f94742abd1f50c33f5b6bab969c51d.png)
- C、
![](http://tikupic.21cnjy.com/2021/12/24/70/c5/70c53a1259050f2e824e0e48c6bb2e4c.png)
- D、
![](http://tikupic.21cnjy.com/2021/12/24/f5/9b/f59bde0c964075377da1d769afaa8920.png)