题干

甲、乙两个恒容密闭容器中均发生反应:C(s)+2H2O(g)⇌CO2(g)+2H2(g)△H>0,有关数据如表所示.下列说法正确的是(   )

容器

容积/L

温度/℃

起始量/mol

平衡量/mol

达到平衡所需时间/min

平衡时吸收的热量

C(s)

H2O(g)

H2(g)

2

T1

2

4

3.2

2.5

Q1

1

T2

1

2

1.2

3

Q2

A:T1<T2

B:Q1>Q2

C:甲容器中,混合气体的密度始终保持不变

D:乙容器中,反应进行到1.5min时,n(H2O)=1.4mol

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B

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