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200447014

新虫 (初入文坛)

[求助] 含水1%的己烷的饱和蒸汽压怎么算?

求助求助,己烷含水1%时算其在70℃下的饱和蒸汽压。怎么计算?请详解,另外己烷与水会形成共沸物吗?我查到一个300多种常见共沸物的组成的帖子,但是里面没有己烷和水的共沸物。请大神们帮帮我吧
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【答案】应助回帖

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见证2011: 金币+1, 欢迎常来! 2012-07-20 12:32:33
用拉乌尔定律算:p=p1n1+p2n2,p:纯组分在一定温度时的蒸气压n:体系中某组分的摩尔分数。水是极性分子,己烷是非极性分子,不能形成共沸混合物吧。

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2楼2012-07-19 16:00:04
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木虫 (著名写手)

【答案】应助回帖

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见证2011: 金币+1, 欢迎常来! 2012-07-20 12:32:40
参考傅献彩的物理化学,关于溶液的部分,一楼说的拉乌尔定律是正解
3楼2012-07-20 10:57:01
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