CHEM 121 Chapter Notes - Chapter 10: Supercritical Fluid, Trigonal Planar Molecular Geometry, Gas Constant
Document Summary
Dipole moment (greek mu) (measure of net molecular polarity is this quantity) *magnitude of charge q at either end of molecular dipole times distance r between the charge: (mu) = q * r. 30 coulomb meters (c * m) in si units. Intermolecular forces (that act between molecules to hold them close together at certain temperature) Ion-dipole force (result of electrical interactions between anion and partial charges on a polar molecule) Ion-dipole forces are highly variable in strength and are particularly important in aqueous solutions of ionic substances such as nacl, in which polar water molecules surround the ions. Dipole-dipole forces (result of electrical interactions among dipoles on neighboring molecules) London dispersion forces (result from motion of electrons) *all atoms and molecules, regardless of structure, experience this. Hydrogen bond (an attractive interaction between a hydrogen atom bonded to very electronegative atom (o, n, and f) and an electron-rich region elsewhere in same molecule or in different molecule)
