Chapter 12 Flashcards
IaMF
intramolecular interactions; forces that occurs within a molecule
IMF
intermolecular interactions; forced that occur between individual molecules
Covalent bonds are classified as…
IaMF
IMF strength can determine…
the physical state of a molecular substance at a particular temperature and pressure
T/F: Covalent bonds break during chemical changes.
true; depending on the reaction
T/F: Covalent bonds break during physical changes.
false; only chemical (possibly)
Higher temperature […] attractive forces.
Lower temperature […] attractive forces.
greater than; less than
Sublimation:
phase change where a solid coverts to a gas
Deposition:
phase change where a gas converts to a solid
Triple point:
all 3 phases coexist
Critical point:
blend b/w gas and liquid; there is no distinct line
Bonding forces are […] because […] are closer together.
relatively stronger; larger charges
IMF are […] because […] are farther apart.
relatively weaker; smaller charges
List the bonding forces from strongest to weakest:
Ionic > Covalent > Metallic
Ionic deals with a […] while covalent has the […]. Metallic bonding has […].
cation-anion; nuclei share; cations delocalized
List the nonbonding forces from weakest to strongest:
Dispersion < Dipole Induced Dipole < Ion Induced Dipole < Dipole-Dipole < H-bond < Ion-Dipole
Example of Ion-Dipole:
Na—OH2
Example of H-bond:
H-X
*X = N, O, F
Example of Dipole-Dipole:
I-Cl—I-Cl
Example of Ion Induced Dipole:
Fe—O2
Example of Dipole Induced Dipole:
H-Cl—Cl-Cl
Example of Dispersion:
F-F—F-F
Phase change chart: what is on the x-axis? the y?
x-axis: temperature
y-axis: pressure
Heat curve: if the gas is plotted on the left side, going from left to right what is happening to the heat?
heat is being released (exothermic)