We are asked to determine if the energies of multiple dispersion forces between two molecules are larger than the energy of hydrogen bonding between the two molecules.
Despite the use of the word “bond,” keep in mind that hydrogen bonds are intermolecular attractive forces, not intramolecular attractive forces (covalent bonds). Hydrogen bonds are much weaker than covalent bonds, only about 5 to 10% as strong, but are generally much stronger than other dipole-dipole attractions and dispersion forces.
Flowchart for determining intermolecular forces. Multiple types of intermolecular forces can be at work in a given substance or mixture. In particular, dispersion forces occur in all substances.
Can the energies of multiple dispersion forces between two molecules be larger than the energy of hydrogen bonding between the two molecules?
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