在一个容积为500毫升的密闭容器中，充入5molH2和2molCO，在一定温度和一定压强下发生如下反应：2H2(g )+CO(g) 
CH3OH（g），经过5分钟后达到平衡状态，若此时测得CH3OH蒸汽的浓度为2mol/L，求:
（1）以H2的浓度变化表示的该反应的速率；
（2）达到平衡时CO的转化率；
（3）该温度下的K
（1）0.8mol/(L·min) （2）50％ （3）1/36
平衡时生成CH3OH蒸汽的浓度为2mol/L，即物质的量为1mol。
2H2(g )+CO(g) 
CH3OH（g）
起始量（mol） 5 2 0
转化量（mol） 2 1 1
平衡量（mol） 3 1 1
所以以H2的浓度变化表示的该反应的速率为
。
到平衡时CO的转化率50％。
该温度下的平衡常数为
。
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