Interpretation: The reason corresponds to the fact that the normal boiling points generally lower for branched hydrocarbons than for straight-chain a hydrocarbon of the same molecular mass is to be stated.
Concept introduction: Boiling point of a liquid is the temperature at which vapor pressure is equal to the atmospheric pressure. Boiling point of the same liquid varies according to the surrounding conditions. The straight chain hydrocarbon comprises large surface area while the branched hydrocarbon smaller surface area. Surface area of the compounds is directly proportional to the dispersion forces. Dispersion forces are directly proportional to the boiling point of the compound.
To determine: The reason corresponds to the fact that the normal boiling points generally lower for branched hydrocarbons than for straight-chain hydrocarbons of the same molecular mass.
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Chemistry: The Science in Context (Fifth Edition)
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