Chapter 11: Intermolecular Forces Flashcards
Dispersion Forces
- INDUCED Dipole
- Increase in strength with molecular weight
Polarizability increases with ______.
number of electrons
The greater the _____ of the molecule, the more easily the molecule can get induced dipole.
polarizability
Dipole-dipole forces
-Involves presence of permanent dipole moment in polar molecules
For molecules of same mass & size, strength of IMF increases with increasing _____.
polarity
H Bonding
- Part of dipole-dipole forces
- B/t H atom in polar bond (H-F, H-O, H-N) and nonbonding pair in nearby small electronegative atom (usually F, O, N) n another molecule
Boiling point of compounds containing group 4A elements ____ increase down the group.
increase
polarizability
the ease with which the charge distribution within a molecule is distorted to give an instantaneous dipole
vapor pressrue
the pressure exerted by the vapor of a liquid when the liquid and and vapor states are at equilibrium
Ion-dipole forces
- Between ion and polar molecule
a) Ion-permanent dipole
b) Perm. dipole-perm. dipole
c) perm. dipole-induced dipole
d) induced dipole-induced dipole
viscosity
- the resistance of a liquid to flow
- The greater the viscosity, the more slowly it flows
surface tension
-the energy requires to increase the surface area by a unit amount
critical pressure
the pressure required to bring about liquefaction at critical temperature
critical temperature
the highest temperature at which a liquid phase can form
dynamic equilibrium
when rate of evaporation equals rate of condensation
