.以二氧化碳和氢气为原料制取乙醇的反应为:2CO2(g)+6H2 (g) CH3CH2OH(

以二氧化碳和氢气为原料制取乙醇的反应为:2CO2(g)6H2 (g) CH3CH2OH(g)3H2O(g) ΔH<0。某压强下的密闭容器中,按CO2H2的物质的量比为1∶3投料,不同温度下平衡体系中各物质的物质的量百分数(y%)随温度变化如图所示。下列说法正确的是(  )

Aa点的平衡常数小于b           Bb点,v(CO2)v(H2O)

Ca点,H2H2O物质的量相等      D.其他条件恒定,充入更多H2v(CO2)不变

答案

C

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