Chapter 11

Question 1

what affects vapor pressure in liquids?

Answer 1

temp and intermolecular pressure

Question 2

lattice energy

Answer 2

energy released when 1 mol of an ionic compound forms from its free ions in the gas phase

Question 3

vapor pressure

Answer 3

pressure exerted by a gas in equilibrium with liquid

Question 4

which R do you use with the CC equation?

Answer 4

8.3145

Question 5

what does normal mean?

Answer 5

1 atm

Question 6

how do you find total vapor pressure?

Answer 6

mole fraction x partial pressure

Question 7

colligative properties

Answer 7

set of properties of a solution relative to the pure solvent

Question 8

what are colligative properties dependent on?

Answer 8

concentration of solute particles not identity

Question 9

what is molality?

Answer 9

moles over kg of solvent

Question 10

how does lattice energy affect solubility?

Answer 10

large lattice energy means limited solubility

Question 11

volatile

Answer 11

having a significant vapor pressure at a given temp

Question 12

what is the vapor pressure at a liquids normal boiling point?

Answer 12

1 atm

Question 13

when is a liquid more volatile?

Answer 13

when it has a higher vapor pressure

Question 14

if a solute-solvents interactions are stronger than solvent-solvent, which way does it deviate?

Answer 14

negatively (up)

Question 15

if a solute-solvents interactions are weaker than solvent-solvent, which way does it deviate?

Answer 15

positively (down)

Question 16

examples of colligative properties

Answer 16

boiling point elevation and freezing point depression

Question 17

why are theoretical and experimental values on van’t Hoffs factor different?

Answer 17

cations and actions cluster together and act as one molecule

this causes the fbd and the bpe to be less than predicted

Question 18

osmotic pressure

Answer 18

pressure applied across a semipermeable membrane to stop the flow