Intermolecular Forces (VCE SSCE Chemistry): Flashcards
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Intermolecular forces definition
Intermolecular forces definition
Attractive forces between molecules
Intermolecular forces vs covalent bonds
Intermolecular forces vs covalent bonds
Much weaker than covalent bonds
Three types of intermolecular forces
Three types of intermolecular forces
Dispersion, dipole-dipole, hydrogen bonding
Strength order (weakest to strongest)
Strength order (weakest to strongest)
Dispersion < Dipole-dipole < Hydrogen bonding
Which molecules have dispersion forces
Which molecules have dispersion forces
All molecules (polar and non-polar)
Cause of dispersion forces
Cause of dispersion forces
Temporary dipoles from electron movement
Molecules with dipole-dipole attraction
Molecules with dipole-dipole attraction
Polar molecules with permanent dipoles
Hydrogen bonding requirements (NOF rule)
Hydrogen bonding requirements (NOF rule)
H bonded to N, O, or F + lone pairs on neighbours
Hydrogen bonding vs dipole-dipole strength
Hydrogen bonding vs dipole-dipole strength
About 10 times stronger
Effect of molecular mass on dispersion
Effect of molecular mass on dispersion
Larger mass/more electrons = stronger dispersion