Intermolecular Forces

• Keeps shape when placed in a container

  Fixed
• Takes the shape of the container

  Indefinite
• The ability to move from one position in space to another

  Translational freedom
• The ability to reorient the particle’s direction in space

  Rotational
• The ability to oscillate about a particular point in space

  Vibrational
• the motion of molecules, thermal energy

  Heat
• Solids with their particles arranged in an orderly geometric pattern

  crystalline solids
• Solids with their particles that do not show a regular geometric pattern over a long range

  Amorphous solids
• Due to attractive forces between opposite charges

  Intermolecular attractions
• Temporary polarity in the molecules due to unequal electron distribution leads to attractions called

  Dispersion forces
• Permanent polarity in molecules due to their structure leads to attractive forces called

  Dipole-dipole attractions
• Where an especially strong dipole-dipole attraction results when H is attached to an extremely electronegative atom

  Hydrogen bonds
• Attractive forces caused by temporary dipoles are called

  Dispersion forces