Strengthdependson polarizability londonforces

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Unformatted text preview: t on coulombic interacCon Ep = q1q2 4πεor •  Responsible for condensed phases of ma>er •  Ion‐ ion > dipole‐dipole>London forces •  Hydrogen bonding special type of dipole‐dipole Ion‐Ion •  Already covered in the context of bonding, however also described as the strongest type of intermolecular force •  Strength varies, higher charge on ions, stronger a>racCon Dipole‐Dipole •  Exist between polar molecules •  Strength depends on polarity of molecules, higher dipole moment, stronger the interacCon Hydrogen Bonding •  Special type of dipole‐dipole interacCon •  Occurs in compounds with a H bound to a F, N or O London Forces (dispersion, induced dipole or Van der Waals) •  Exist in all condensed substances •  Caused by induced dipoles, which come and go in nonpolar molecules and atoms •  Strength depends on polarizability London Forces •  Strength also depends on molar mass of compound •  Pentane vs pentadecane vs octadecane •  Strength depends on shape of molecule •  Think of velcro Me...
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