试题详情
SiHCl
3在催化剂作用下主要发生反应:2SiHCl
3(g)
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmover%3E%3Cmo%3E%E2%87%8C%3C%2Fmo%3E%3Cmrow%3E%3C%2Fmrow%3E%3C%2Fmover%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
SiH
2Cl
2(g)+SiCl
4(g) Δ
H=+48kJ·mol
-1。已知:反应速率
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmi%3Ev%3C%2Fmi%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3Ev%3C%2Fmi%3E%3Cmi%3E%E6%AD%A3%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3Ev%3C%2Fmi%3E%3Cmi%3E%E9%80%86%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmtext%3E%3D%3C%2Fmtext%3E%3Cmsub%3E%3Cmi%3Ek%3C%2Fmi%3E%3Cmi%3E%E6%AD%A3%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmsup%3E%3Cmi%3Ex%3C%2Fmi%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmsup%3E%3Cmsub%3E%3Cmrow%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmrow%3E%3Cmo%3E%28%3C%2Fmo%3E%3Cmrow%3E%3Cmsub%3E%3Cmrow%3E%3Cmtext%3ESiHCl%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmtext%3E3%3C%2Fmtext%3E%3C%2Fmsub%3E%3C%2Fmrow%3E%3Cmo%3E%29%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmrow%3E%3C%2Fmsub%3E%3Cmtext%3E-%3C%2Fmtext%3E%3Cmsub%3E%3Cmi%3Ek%3C%2Fmi%3E%3Cmi%3E%E9%80%86%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmsub%3E%3Cmi%3Ex%3C%2Fmi%3E%3Cmrow%3E%3Cmrow%3E%3Cmo%3E%28%3C%2Fmo%3E%3Cmrow%3E%3Cmsub%3E%3Cmrow%3E%3Cmtext%3ESiH%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmtext%3E2%3C%2Fmtext%3E%3C%2Fmsub%3E%3Cmsub%3E%3Cmrow%3E%3Cmtext%3ECl%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmtext%3E2%3C%2Fmtext%3E%3C%2Fmsub%3E%3C%2Fmrow%3E%3Cmo%3E%29%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmrow%3E%3C%2Fmsub%3E%3Cmsub%3E%3Cmi%3Ex%3C%2Fmi%3E%3Cmrow%3E%3Cmrow%3E%3Cmo%3E%28%3C%2Fmo%3E%3Cmrow%3E%3Cmsub%3E%3Cmrow%3E%3Cmtext%3ESiCl%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmtext%3E4%3C%2Fmtext%3E%3C%2Fmsub%3E%3C%2Fmrow%3E%3Cmo%3E%29%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmrow%3E%3C%2Fmsub%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
,
k正、
k逆分别为正、逆向反应速率常数,
x为物质的量分数,在323K和343K时SiHCl
3的转化率随时间变化的结果如图所示。
下列说法正确的是( )
- A、343K时反应物的平衡转化率为21%
- B、a点的反应速率小于b点的反应速率
- C、343K时
= ![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfrac%3E%3Cmrow%3E%3Cmtext%3E0%3C%2Fmtext%3E%3Cmsup%3E%3Cmrow%3E%3Cmtext%3E.11%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmtext%3E2%3C%2Fmtext%3E%3C%2Fmsup%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E0%3C%2Fmtext%3E%3Cmsup%3E%3Cmrow%3E%3Cmtext%3E.78%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmtext%3E2%3C%2Fmtext%3E%3C%2Fmsup%3E%3C%2Fmrow%3E%3C%2Fmfrac%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
- D、由323K的平衡转化率数据,不能计算323K的平衡常数K
知识点
参考答案