91Ó°ÊÓ

Higher the boiling point of the compound, less volatile will it be. As the number of carbon atoms or length of carbon chain increases, the boiling point also increases. This is due to increase in attractive forces between the molecules and it will take more energy to overcome that force of attraction, thereby increasing the boiling point. Branching in molecules decreases the boiling point. Nonane will have higher boiling point than 3-methylheptane due to its higher molecular weight and linear structure whereas 3-methylheptane is not linear.

Branching in molecules decreases the boiling point of the molecule as when length of carbon chain increases, there occurs increase in the surface area of the compound. Increase of surface area increases the ability of molecules to attract each other. Branching in molecules decreases the surface area due to which boiling point decreases. Octane has higher boiling point than 2,3,4-trimethylheptane as octane is linear whereas 2,3,4-trimethylheptane is branched.

Higher the boiling point of the compound, less volatile will it be. As the number of carbon atoms or length of carbon chain increases, the boiling point also increases. This is due to increase in attractive forces between the molecules and it will take more energy to overcome that force of attraction, thereby increasing the boiling point. Branching in molecules decreases the boiling point. Nonane will have higher boiling point than 2,3,5-trimethylhexane due to its higher molecular weight and linear structure whereas 2,3,5-trimethylhexane is not linear.