2CH3OH == CH3OCH3 + H2O
2 1 1
若将浓度为0.6 CH3OCH3和0.6 H2O全部转化为CH3OH,则CH3OH的浓度增加了1.2
所以CH3OH的起始浓度为0.44 + 1.2 = 1.64,A错；
此时Q = c(CH3OCH3) * c(H2O)/[c(CH3OH)]^2 = 0.6*0.6/0.44^2 = 1.86 < 400
说明正反应还未进行到平衡状态,所以仍然是正反应速率大于逆反应速率,B错；
2CH3OH == CH3OCH3 + H2O
起始 1.64 0 0
反应 2x x x
平衡 1.64-2x x x
平衡时有：K = x^2/(1.64-2x)^2 = 400
解得x = 0.8
所以平衡时CH3OH的浓度 = 1.64-2x = 0.04,C对；
平衡时CH3OH的转化率 = 2x/1.64 = 97.6% > 80%,D错
选C