Chem 101 Intermolecular Forces

Flashcards about intermolecular forces.

Hydrogen Bond

A type of intermolecular force that occurs between molecules containing hydrogen atoms bonded to highly electronegative atoms (such as nitrogen, oxygen, or fluorine).

Substance that can form hydrogen bonds

Hydrazine (H2NNH2)

Substance with significant hydrogen bonding

Hydrogen peroxide (H2O2, also written as HOOH)

Ionic Bonds (ion-ion)

Attractive forces between positive and negative ions

Dipole-dipole forces

Attractive forces between polar molecules

London Dispersion forces

Temporary attractive forces that result when electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles.

Ion-dipole forces

Attractive forces between an ion and a polar molecule

Covalent bonds

The type of chemical bond where electrons are shared between atoms.

IMFs from strongest to weakest

Ionic Bonds > Ion dipole forces> Hydrogen Bonds > Dipole-dipole forces> London Dispersion forces

BaCl2 IMF

Ionic Bonds (ion-ion)

H2 IMF

London Dispersion forces

CO IMF

Dipole-dipole forces, London Dispersion forces

HF IMF

Hydrogen Bonds, Dipole-dipole forces, London Dispersion forces

Ne IMF

London Dispersion forces

Substances in order of increasing boiling points (low to high)

H2 < Ne < CO < HF < BaCl2

CH3CH3 (Ethane) IMF

London Dispersion forces

CH3OH (methanol) IMF

Hydrogen Bonds, Dipole-dipole forces, London Dispersion forces

CH3CH2OH (ethanol) IMF

Hydrogen Bonds, Dipole-dipole forces, London Dispersion forces

Substance with the highest boiling point

CH3CH2OH (ethanol)