Hexane, CH3CH2CH2CH2CH2CH3, has a boiling point of 69ºC, while butane has a boiling point of 0.4ºC. Both molecules are nonpolar. Describe the significant difference between these two substances' boiling points.
Intermolecular attractions are the likely cause of the significant disparity in the boiling points of butane and hexane. Due to its size (molecular weight = 86) and higher number of electrons and nuclei, hexane has stronger and more durable van der Waals forces. With a molecular weight of 58, butane is a smaller molecule with less van der Waals forces.
Hexane has a higher boiling point than butane as a result, while butane has a lower boiling point.
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