MATLS 2B03 Lecture Notes - Lecture 11: London Dispersion Force, Intermolecular Force, Poise

• School: McMaster University
• Department: Materials Science and Engineering
• Course: MATLS 2B03
• Professor: Dmitri Malakhov

Document Summary

Explaining the physical properties of gases was simplified since the interactions between the gas molecules could be ignored. However the particles in a liquid or solid are fairly close together and their mutual interactions cannot be ignored. Condensed phases and intermolecular forces will play a major role in explaining their physical properties. Ionic: transfer of atomic electrons and subsequent attraction. Non-bonding interactions do not result in the formation of a chemical bond. These are intermolecular interactions arising from intermolecular forces. A coulombic interaction between an ion and the dipole moment of a molecule. Dipole moments occur when the charge distribution in a molecule is asymmetric. Molecules with a dipole moment are called polar molecules. Depends on the magnitude of the dipole moments. Manifested in the boiling points of polar molecules. Accounts for intermolecular forces in atoms and non-polar molecules. Strength depends on the polarizability of the atom or molecule. Polarizability depends on the size of the atom or molecule.