在恒容密闭容器中,可逆反应C(s)+CO2(g)2CO(g)达到平衡状态的标志是

在恒容密闭容器中,可逆反应C(s)+CO2(g)2COg)达到平衡状态的标志是(   

单位时间内生成n molCO2的同时生成n molC 

单位时间内生成n molCO2 的同时生成2n mol CO 

③CO2 CO的物质的量浓度之比为1: 2的状态 

混合气体的密度不再改变的状态 

混合气体的压强不再改变的状态 

⑥C的质量不再改变的状态

A. ①④⑤⑥    B. ②④⑤⑥    C. ②③⑤⑥    D. ①②③④

答案

B

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