试题与答案

在一定体积的密闭容器中进行如下反应:CO2(g)+H2(g)⇌CO(g)+H2O

题型:问答题

题目:

在一定体积的密闭容器中进行如下反应:CO2(g)+H2(g)⇌CO(g)+H2O(g);其化学平衡常数K和温度t的关系如下表:

t℃70080083010001200
K0.60.91.01.72.6
回答下列问题:

(1)该反应的化学平衡常数表达式为K=______.

(2)该反应为______反应(选填“吸热”或“放热”).

(3)能判断该反应是否达到化学平衡状态的依据是______(多选扣分).

a.容器中压强不变                   b.混合气体中c(CO)不变

c.υ(H2)=υ(H2O)               d.c(CO2)=c(CO)

(4)若向容器中投入各物质2mol,加热到800℃使反应进行,则此时反应的生成物是______.

答案:

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