Unit 3: Intermolecular Forces and Properties Flashcards
(20 cards)
Covalent substances
are liquid at room temperature and will boil when their IMFs are broken.
London Dispersion forces
(LDFs) occur between all molecules and are very weak attractions caused by random electron movements.
Dipoles
are opposite charges separated by some distance.
Vaporization
requires no excess heat to be added.
Solids
have very tight- knit molecules and have the strongest IMFs.
gas law
The combined is used when moles are held constant.
kinetic energy
The (KE) is directly proportional to the temperature.
Effusion
is the rate a gas will escape from a container with microscopic holes from high pressure to low pressure.
covalent bonds
Intermolecular forces (IMFs) are the forces in between .
KE
Even though is the same for gases at the same temperature, this can not be said for velocity because gas molecules have different masses.
Network covalent bonds
are the strongest and are very hard to melt.
unequal share of electrons
The is called a polar covalent bond which also causes a slight partial charge on each atom.
kinetic molecular theory becomes
The invalid when the temperature is too low and /or the pressure is too high because the gases become too tightly packed.
Ionic substances
are usually solids at room temperature.
weakest
Gases have the IMFs and have the most spread apart atoms.
Dipole dipole forces
occur when the positive center of one polar molecule is attracted to the negative end of another polar molecule.
hydrogen bond
occurs between hydrogen and oxygen, nitrogen, or fluorine
polar
a molecule that has electrical charge
nonpolar
a molecule with no electrical charge; equally shared electrons
absorbance
the amount of light that cannot get through a colored solution
