Intermolecular Forces

There are three basic intermolecular forces that a molecule can experience.  They are dipole-dipole, london dispersion, and hydrogen bonding. 


Dipole-dipole occurs in all polar molecules.  Caused by the positive dipole of one molecule being attracted to the negative dipole of another. This intermolecular force is stronger than London Dispersion. Hydrogen bonding is a dipole-dipole attraction but is a special kind where the H of one molecule is attracted to the O,F, or N of a near by molecule.  Finally is london dispersion.  This is the only intermolecular force that propane experiences if it were to be bonded with itself.  London Dispersion forces exist between every two non-polar molecules.They are caused by the movement of electrons between the two molecules, as they move rapidly between the two molecules it creates a temporary dipole.  London Dispersion is a very weak attraction. 


London Dispersion is the only force acting upon the Propane when it bonds with itself.