Problem: Arrange these compounds by their expected boiling point Highest to lowest boiling pointCH3OH, CH4, CH3Cl

FREE Expert Solution

We’re being asked to arrange the given compounds by their expected boiling points.


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.


So, we need to identify the strongest intermolecular forces in each compound.


For CH3OH: The total number of valence electrons present in CH3OH is:

            Group            Valence Electrons

C         4A                   1 × 4 e4 e

H         1A                   4 × 1 e4 e

O         6A                   1 × 6 e6 e

Total:  14 valence e


The Lewis structure of CH3OH is:

95% (398 ratings)
View Complete Written Solution
Problem Details

Arrange these compounds by their expected boiling point 

Highest to lowest boiling point

CH3OH, CH4, CH3Cl

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intermolecular Forces and Physical Properties concept. If you need more Intermolecular Forces and Physical Properties practice, you can also practice Intermolecular Forces and Physical Properties practice problems.