Which of the following has the highest boilin | vedclass

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(A) The boiling point of alkanes depends on the surface area of the molecule. Straight-chain alkanes have a larger surface area compared to branched-c

Vedclass · Accepted Answer

$n$-octane

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(A) The boiling point of alkanes depends on the surface area of the molecule. Straight-chain alkanes have a larger surface area compared to branched-chain alkanes,leading to stronger van der Waals forces of attraction. Among the given options,$n$-octane $(C_8H_{18})$ is a straight-chain alkane with the highest molecular weight and the largest surface area. $n$-butane has a lower molecular weight,while isooctane and neopentane are branched,which reduces their surface area and boiling points. Therefore,$n$-octane has the highest boiling point.

Which of the following has the highest boiling point?

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