Which of the following compounds has the highest boiling point? 2-pentanone pentene chloropentane pentane

chloropentane

Explanation:

When a hydrocarbon has a halogen atom, its properties will change because this group has a higher molecular weight and a higher polar moment that will be hard to defeat in order to reach the boiling point.

The Boiling point of the pentene is 30°C // pentane is 36,1°C //  2-pentanone is 101°C and chloropentane 108°C.

Simple hydrocarbons have lower boiling points compare with those with a functional group like the Oxygen in the 2-pentanone and the Chlorine in the  chloropentane. On the other heand,  Oxygen is not as electronegative and heavy like Chlorine, thus the chloropentane is the one with higher boiling point.

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