Intermolecular forces

• Boiling Point


  the temperature at which vapour pressure is equal to atmospheric pressure o The stronger the intermolecular forces, the higher the boiling point
• Melting Point


  The temperature at which the solid and liquid phases of s substance are at equilibrium o The stronger the intermolecular forces, the higher the melting point
• Vapour Pressure


  The pressure exerted by a vapour at equilibrium with its liquid in a closed system. o The stronger the intermolecular forces, the lower the vapour pressure.
• Solubity


  The property of a solid, liquid, or gaseous chemical substance (solute) to dissolve in a

  solid, liquid, or gaseous solvent to form a homogeneous solution.
• State the relationship between intermolecular forces and molecular size


  non-polar molecules, the strength of induced dipole forces increases with molecular size.