一定条件下,可逆反应2AB+3C,在下列四种状态中,处于平衡状

一定条件下,可逆反应2AB3C,在下列四种状态中,处于平衡状态是(  )

正反应速率       逆反应速率

AvA2 mol·L1·min1 vB2 mol·L1·min1

BvA2 mol·L1·min1 vC2 mol·L1·min1

CvA1 mol·L1·min1 vB2 mol·L1·min1

DvA1 mol·L1·min1 vC1.5 mol·L1·min1

答案

解析 将逆反应速率根据化学方程式统一折算成用A表达的速率,来表示A的生成速率,正反应速率表示A的消耗速率,二者相等,则说明达到了平衡状态。

答案 D

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