Intermolecular Forces Video Lessons

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Problem: The strongest intermolecular interactions between ethyl alcohol (CH3CH2OH) molecules in the liquid arise fromA) dipole-dipole forces.B) dispersion forces.C) hydrogen bonding.D) ion-dipole interactions.E) carbon-oxygen bonds.

FREE Expert Solution

We’re being asked to identify the intermolecular forces present in CH3CH2OH

Recall that there are several types of intermolecular forces:

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

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

3. Dipole-dipole interaction – occurs between two polar covalent compounds

4. Induced-dipole interaction – occurs when a nonpolar compound interacts with a polar compound

5. Dispersion forces – occurs in all compounds. This is the primary intermolecular force exhibited by nonpolar compounds.

For this problem, we need to do the following steps:

Step 1: Calculate the total number of valence electrons present.

Step 2: Draw the Lewis structure for the molecule.

Step 3. Determine the polarity and IMF of the molecule.

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Problem Details

The strongest intermolecular interactions between ethyl alcohol (CH3CH2OH) molecules in the liquid arise from

A) dipole-dipole forces.

B) dispersion forces.

C) hydrogen bonding.

D) ion-dipole interactions.

E) carbon-oxygen bonds.

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