Question

Arrange the compounds in order from highest to lowest boiling point. Consider how noncovalent interactions would affect the boiling point rather than looking up actual boiling points. Highest boiling point propane сс. isopropanol dichloromethane (CH,CI,) 1-butene Lowest boiling point Answer Bank Identify the three true statements. Stronger intermolecular forces usually correlate with higher boiling points. Boiling point generally increases with molecular weight due to increased strength of dispersion forces. Hydrocarbons exhibit only dispersion forces. Dipolo-dipole interactions are stronger than dispersion forces and hydrogen bonds. Hydrogen bonds require carbon, hydrogen, and a halogen.

Answer 1

Answer:

Isopropanol>dichloromethane>1-butene>propane

Explanation:

Stronger intermolecular forces usually correlate with higher boiling points

Boiling points generally increases with molecular weight due to increased strength of dispersion forces

Hydrocarbons exhibit only dispersion forces.

For the arrangement of compounds above, isopropanol has the highest boiling point because it forms hydrogen bonds with water. Dichloromethane possess dipole-dipole interaction which accounts for its higher boiling point. 1-butene has a higher boiling point than propane because it has higher molecular mass thus greater dispersion forces.