CHEM 102 Lecture 12: CH 12 Chem
Document Summary
Moderate or strong force = liquid or solid w/ high melting and boiling points. Weak force = gas w/ weak melting and boiling points. Result of smaller charges interacting at greater distances. Arise from fluctuations in electron distribution where one side is negative and the other is positive (instantaneous dipole) Magnitude of the force depends on how easily the electrons polarize/move due to instantaneuous dipole (positive end attracts the negative end of neighboring atoms), which depends on the size of the electron cloud. Greater electron cloud = greater dispersion force since electrons are held less tightly and can move easier. Imf force increases w/ molar mass (and increases w/ boiling point) I2 since it has the highest molar mass. In polar molecules w/ electron rich and electron deficient regions. Permanent dipole positive end of a polar molecule attracts the negative end of another polar molecule. Miscible (can separate w/o separating into 2 states)
