下列可逆反应已经达到平衡,选项中的说法一定能说明化学平衡向正

下列可逆反应已经达到平衡,选项中的说法一定能说明化学平衡向正反应方向移动的是

A.N2O4(g)2NO2(g),改变某一条件后,气体颜色加深

B.N2(g)+3H2(g)2NH3(g),改变某一条件后,NH3的体积分数增大

C.H2(g)+I2(g)2HI(g),单位时间内消耗H2HI的物质的量之比大于1∶2

D.2SO2(g)+O2(g)2SO3(g),恒温恒压条件下,充入He

答案

C

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