Part 9 Flashcards
is entropy increasing or decreasing for melting, vaporization and sublimation?
increasing
what causes the solid-liquid line in phase diagram of water to be skewed to the left?
hydrogen bonding
skewed to left= line points right
in general, under what conditions is the gas phase found?
high temp
low pressure
in general, under what conditions is the liquid phase found?
high temp
high pressure
under what conditions is the gas phase typically found?
low temp
high pressure
??
on a phase shift diagram, what is the critical point?
point of temp and pressure beyond which no distinction can be made between liquid and gas phases.
on phase shift diagram what is the triple point?
point where all 3 phases are in equilibrium
what can effect vapor pressure?
only temperature
what can effect K (or any variation there of)
only temperature!
what is freezing point depression based on?
the fact that addition of solute particles lowers freezing point by interfering with the process of crystal formation.
what effect does the addition of solute have on freezing point?
solute lowers freezing point!
what happens to a liquid when its vapor pressure = atmospheric pressure?
it boils
how is boiling point elevation calculated?
same as freezing point depression; where bp elevation= molality*Kb value
what does the addition of solute have on bp on a solution?
increases bp (think salt in water when cooking pasta)
as the concentration of solution increase, the osmotic pressure does what?
also increases
