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Explain, why propanol has higher boiling point than that of the hydrocarbon, butane?

Answer»

Solution :The molecules of butane are HELD together by weak van der Waals. force of attraction while those of propanol are held together by stronger INTERMOLECULAR hydrogen bonding as shown :
`{:("- - - - - - - -"overset(delta+)H-overset(delta-)O"- - - - - - - -"overset(delta+)H-overset(delta-)O"- - - - - - - -"overset(delta+)H-overset(delta-)O"- - - - - - - -"),("|||"),(""CH_(2)CH_(2)CH_(3)""CH_(2)CH_(2)CH_(3)""CH_(2)CH_(2)CH_(3)):}`
GREATER the intermolecular interactions, higher the BOILING point.
Therefore, the boiling point of propanol is much higher than that of butane.


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