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Arrange the following compounds according to their expected boiling points, with the lowest boiling point first, and explain your answer. Notice that the compounds have similar molecular weights. |
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Answer» Solution :The order of increasing boiling points is : PENTANE `lt` DIETHYL ether `lt` sec-butyl ALCOHOL Pentane has no polar groups and has only dispersion FORCES holding its molecules together. It would have the lowest boiling point. Diethyl ether has the polar ether group that provides dipole-dipole forces which are greater than dispersion forces, meaning it would have a higher boiling point than pentane. sec-Butyl alcohol has an -OH group that can form strong hydrogen bonds: therefore, it would have the highest boiling point. |
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