.一定条件下,容积为1L的密闭容器中发生反应: SiF4(g)+2H2O(g)S

.一定条件下,容积为1L的密闭容器中发生反应:

SiF4g+2H2OgSiO2s+4HFg  H=+148.9 kJ·mol-1

下列各项中不能说明该反应已达化学平衡状态的是(   

AvSiF4消耗=4vHF生成         BHF的体积分数不再变化

C.容器内气体压强不再变化       D.容器内气体的总质量不再变化

答案

A

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