Question

Why does butane have more boiling point than isobutane ?

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Solution
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butane have more boiling point than isobutane because :-
Butane has a straight chain structure whereas isobutane has a branched chain structure. A branched chain exhibits weaker Van Der Waals forces as compared to straight chains. Strong intermolecular forces in butane results in a higher boiling point as larger energy is required to separate them.

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