Problem: Rank these compounds by boiling point.Select the compound that has the highest boiling point, based on that compound's dominant intermolecular force.A. pentanalB. 1-fluoropentaneC. diethyl etherD. 1-pentanol

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FREE Expert Solution

We’re being asked to identify the compound with the highest boiling point among the given choices.


Recall that there are several types of intermolecular forces (IMF):

1. Ion-dipole interaction – occurs between an ion and a polar covalent compound; strongest IMF

2. Hydrogen bonding – occurs in compounds where hydrogen is directly connected to an electronegative element such as N, O, or F; 2nd strongest IMF

3. Dipole-dipole interaction – occurs between two polar covalent compounds; 3rd strongest IMF

4. Dispersion forces – occurs in all compounds and is the primary IMF exhibited by nonpolar compounds; weakest IMF


Compounds with strong intermolecular forces have high boiling points. This is because they require more energy to be able to break the bonds during the phase transition.


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Problem Details

Rank these compounds by boiling point.

Select the compound that has the highest boiling point, based on that compound's dominant intermolecular force.

A. pentanal

B. 1-fluoropentane

C. diethyl ether

D. 1-pentanol