单选题 适中0.65 引用1 组卷331
由合成气制备二甲醚的主要原理如下。下列有关说法正确的是
①CO(g) + 2H2(g) ⇌CH3OH(g)
②2CH3OH(g) ⇌CH3OCH3(g) + H2O(g)
③CO(g) + H2O(g) ⇌CO2(g) + H2(g)
①CO(g) + 2H2(g) ⇌CH3OH(g)
②2CH3OH(g) ⇌CH3OCH3(g) + H2O(g)
③CO(g) + H2O(g) ⇌CO2(g) + H2(g)
A.反应3H2(g) + 3CO(g) ⇌CH3OCH3(g) + CO2(g)的=-246.1 |
B.将1molCO(g)和2molH2(g)充分反应,反应会放出能量小于90.7kJ |
C.反应CO(g) + 2H2(g) ⇌CH3OH(l) |
D.反应③使用催化剂,减小 |
21-22高二上·内蒙古乌兰察布·期中
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由合成气制备二甲醚的主要原理如下。下列有关说法正确的是( )
①CO(g)+2H2(g) CH3OH(g) ΔH1=﹣90.7 kJ·mol-1
②2CH3OH(g) CH3OCH3(g)+H2O(g) ΔH2=﹣23.5 kJ·mol-1
③CO(g)+H2O(g) CO2(g)+H2(g) ΔH3=﹣41.2 kJ·mol-1
①CO(g)+2H2(g) CH3OH(g) ΔH1=﹣90.7 kJ·mol-1
②2CH3OH(g) CH3OCH3(g)+H2O(g) ΔH2=﹣23.5 kJ·mol-1
③CO(g)+H2O(g) CO2(g)+H2(g) ΔH3=﹣41.2 kJ·mol-1
A.升高温度能加快反应②的化学反应速率,提高CH3OCH3产率 |
B.反应③使用催化剂,ΔH3减少 |
C.反应3H2(g)+3CO(g) CH3OCH3(g)+CO2(g)的ΔH=﹣246.1 kJ·mol-1 |
D.反应③对反应②无影响 |
通过以下反应可获得新型能源二甲醚(CH3OCH3)。下列说法不正确 的是
①C(s)+H2O(g)=CO(g)+H2(g) ΔH1=akJ·mol-1
②CO(g)+H2O(g)=CO2(g)+H2(g) ΔH2=bkJ·mol-1
③CO2(g)+3H2(g)=CH3OH(g)+H2O(g) ΔH3=ckJ·mol-1
④2CH3OH(g)=CH3OCH3(g)+H2O(g) ΔH4=dkJ·mol-1
①C(s)+H2O(g)=CO(g)+H2(g) ΔH1=akJ·mol-1
②CO(g)+H2O(g)=CO2(g)+H2(g) ΔH2=bkJ·mol-1
③CO2(g)+3H2(g)=CH3OH(g)+H2O(g) ΔH3=ckJ·mol-1
④2CH3OH(g)=CH3OCH3(g)+H2O(g) ΔH4=dkJ·mol-1
A.反应①、②为反应③提供原料气 |
B.反应③也是CO2资源化利用的方法之一 |
C.反应C(s)+2H2O(l)=CO2(g)+2H2(g)的ΔH=(a+b)kJ·mol-1 |
D.反应2CO(g)+4H2(g)=CH3OCH3(g)+H2O(g)的ΔH=(2b+2c+d)kJ·mol-1 |
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