※ [本文轉錄自 Chemistry 看板]
作者: farst (MindBlast) 看板: Chemistry
標題: 請問拉午爾定律..
時間: Sat Dec 3 01:40:12 2005
29.6 度C pure water has a vapor pressure of 31.1torr.
A solution is prepared by adding 86.7g of Y
a nonvolatile-nonelectroyle to 350g of water
The vapor pressure of the resulting solution is 28.6torr
Calculate the molar mass of Y.
我是這樣算
P=XP'
28.6= (350/18)/(350/18+86.7/Y) * 31.1
Y=86.7/[(350*31.1)/(18*28.6)-350/18] 約51
可是答案是49.9....-_-;;我是錯在哪裡了嗎?
不解離的非電解質...我這樣算沒錯吧?
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