Test 1- Chem 112- St. Thomas- Summer Flashcards
which are bonding forces?
intERmolecular
when are london forces stronger?
larger molar mass,
more imfs mean…
lower temp and closer to solid
when does vapor pressure go up?
when temp goes up
higher altitude means what for vapor pressure?
lower, so there is a lower boilng point
pressure cooker
increased pressure, so increades temp, so food is cooking at higher temp
vaporization, endo or exo
exo
condensation, endo or exo
endo
ion dipole
intER, high water soluability
electrostatic force
inrRA, undissolvable
more london forces means
more solubility
gases: higher temp
decreased solubility
colligative properties
depend on concentration, not chemical identity. vapor pressure, boiling point, freezing point, osmotic pressure
molality
moles solute/kg solvent
mole fraction
moles A/ total moles
boiling
boiling when vapor pressure = atmospheric pressure
osmotic pressure
faster solute to solvent
what affects rate
chemical properties
physical state of reactants
temp
concentration of reactants
presence of catalyst
graph: zero
decreasing left to right, slope = -k
graph: first
decreasing left to right, slope = -k
graph, second
increasing left to right, slope = k
reaction intermediates
formed and used up during overall reaction
elementry reactions
individual steps of reaction
one molecule step
unimolecular
two molecule step
bimolecular
3 molecule step
termolecular
rate determining step
slowest step
catalyst
speed reactiion by decreasing activation energy
less IMFs mean
higher temp and closer to gas
conversions
1atm=760torr=760hgmm=14.7psi=101325pa=1.01325bar
voltility
how well something turns into a vapor
Less london dispersion force=
lower boiling point
in phase transitions, does temp change?
NO
water freezing point
0C
strongest IMF between solvent and solute
ion-dipole
