Unit 3.2

Question 1

vapor pressure

Answer 1

the tendency to evaporate

Question 2

higher vapor pressure=

Answer 2

weaker IMF

bc with weaker attractive forces, they can vaporize more so, higher vapor pressure

Question 3

stronger forces=

Answer 3

higher boiling point, lower vapor pressure

Question 4

how are ionic solids formed

Answer 4

strong interactions between ions

Question 5

ionic solid vapor pressure

Answer 5

low vapor pressure
(dont evaporate easily)

Question 6

ionic solid boiling point and characteristics

Answer 6

• high melting point
  -brittle (from repulsions of like charges when ions shift)

Question 7

covalent solids

Answer 7

-strong IMF
-high melting points
-hard: diamond (structure is fixed)
-soft: graphite (layers slide past each other)

covalent: share valence electrons

Question 8

Molecular solids

Answer 8

-weak IMF
-low melting points
-no electricity

Question 9

Metallic solids

Answer 9

-made of metal atoms where valence electrons allow them to conduct electricity and heat

-malleable
-ductile (stretched)
-in interstitial alloys (smaller atoms fill in the spaces between) decreases malleability and ductility

Question 10

Large biomolecules or polymers

Answer 10

noncovalent: occurs in large molecules (like proteins or DNA)
shape depends on noncovalent interactions (like hydrogen bonds)

Question 11

dynamic equilibrium

Answer 11

a point reaches in a sealed container in which the rate of evaporation is equal to the rate of condensation

Question 12

When temperature increases…

Answer 12

kinetic energy increases
causing evaporation

Question 13

low vapor pressure=

Answer 13

strong IMF

bc tendency to evaporate means higher boiling point which means stronger

Question 14

high vapor pressure in relation to boiling point

Answer 14

low boiling point

Question 15

low vapor pressure in relation to boiling point

Answer 15

high boiling point

Question 16

the boiling point of a liquid is defined as

Answer 16

the temp at which the vapor pressure of the liquid is equal to the external pressure surrounding the liquid

Question 17

Covalent Network examples

Answer 17

diamond (C)
Graphite (C)
Silicon (Si)
Quartz (SiO2)
Silicon Carbide (SiC)
boron nitride (BN)

Question 18

lighting a candle is what type of change

Answer 18

chemical change

Question 19

The “colorless gas” propane cannot be liquified at temperatures above 97 °C

is the quoted part a physical or chemical property

Answer 19

physical

Question 20

examples of physical properties

Answer 20

color, state, density, melting point and boiling point.

Question 21

vapor pressure decreases as temp____

Answer 21

decreases

Question 22

2 elements
1st: vapor pressure= 400 temp= 50
2nd: vapor pressure=400 temp=28

which one will have a higher vapor pressure at 15 degrees

Answer 22

the 2nd bc its lower at the same temp so the pressure will decrease less than the first one

Question 23

vapor pressure and temp relationship

Answer 23

congruent

Question 24

vapor pressure and strength relationship

Answer 24

inverse

Question 25

which ones stronger covalent or molecular solids

Answer 25

covalent (diamond,quartz)