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13问答网 > 当乙醇摩尔分数为x=0.7时，乙醇和水的偏摩尔体积分别为多少

当乙醇摩尔分数为x=0.7时，乙醇和水的偏摩尔体积分别为多少

2025-03-16 15:46:08

推荐回答（1个）

回答1：

混合溶液的质量为0.4*18+0.6*46=34.8克
原水的体积为0.4*18/1=7.2毫升，乙醇的体积为0.6*46/0.8=34.5毫升；
混合溶液的体积为34.8/0.8494=40.61毫升；
体积差为7.2+34.5-40.61=1.083毫升；
混合液中水的偏摩尔气体为1.083/0.4=2.7075毫升/摩尔。

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