Intermolecular Forces

Question 1

__________________ forces are forces of attraction between molecules

Answer 1

Intermolecular

Question 2

The forces of attraction between a ion and a polar molecule

Answer 2

Ion-dipole

Question 3

Some ionic compounds do not __________ in water

Answer 3

Dissolve

Question 4

If the ionic bond is __________ than ion-dipole attractions, the compound will not be soluble

Answer 4

Stronger

Question 5

The attractive forces between the negative end of one polar molecule and the positive end of another

Answer 5

Dipole-dipole

Question 6

Occurs between a Hydrogen that is covalently bonded to Flourine, Oxygen, Or Nitrogen and another F, O, or N with at least one lone pair

Answer 6

F, O, or N

Question 7

Molecules with hydrogen bonds have a ____________ boiling point

Answer 7

Higher

Question 8

The stronger the bond the ____________ the potential energy

Answer 8

Lower

Question 9

In which the positive end of a polar molecule attracts the negative end of a non polar species and polarizes it

Answer 9

Dipole-induced Dipole

Question 10

The strength of dipole-induced dipole forces also increases when the non-polar molecule is ________ and more polarizable

Answer 10

Larger

Question 11

• forces that exist between all species
• the only intermolecular forces that keep assemblages of non polar species together
• caused by Coulumbic interactions between temporarily induced dipoles of neighboring species

Answer 11

induced dipole-induced dipole, aka London dispersion forces

Question 12

Larger species with more electrons are more ____________

Answer 12

Polarizable

Question 13

The presence of pi bonds ___________ polarizability

Answer 13

Increases

Question 14

Why are heat of fusion values always positive

Answer 14

Melting is an endothermic process

Question 15

When molecules leave the surface of a liquid to enter the gas phase, they exert a _________

Answer 15

Pressure

Question 16

Vapor pressure increases as temperature ____________

Answer 16

Increases

Question 17

Vapor pressure and rate of evaporation are higher in substances with _________ intermolecular forces

Answer 17

Weaker

Question 18

When does a liquid boil?

Answer 18

When it’s vapor pressure equals the atmospheric pressure

Question 19

The boiling point decreases as the elevation _________

Answer 19

Increases

Question 20

Solids with high vapor pressured have relatively weak intermolecular forces, this can lead to _____________

Answer 20

Sublimation

Question 21

Ionic compounds have a very ______ vapor pressure

Answer 21

Low

Question 22

The resistance of a liquid to spread our and increase its surface area

Answer 22

Surface tension

Question 23

Liquids with stronger intermolecular forces have __________ surface tensions

Answer 23

Greater

Question 24

Intermolecular attractions between the liquid and the gas

Answer 24

Adhesive forces

Question 25

Intermolecular attractions between molecules in the liquid

Answer 25

Cohesive forces

Question 26

____________ caused by cohesive forces, works to reduce the surface area by pulling the liquid up the tube

Answer 26

Surface tension

Question 27

Capillary action leaves a small _________ in the tube

Answer 27

Meniscus

Question 28

The measure of liquids resistance to flow

Answer 28

Viscosity

Question 29

Viscosity increases as the strength of intermolecular forces ____________

Answer 29

Increases

Question 30

Viscosity decreases as temperature ___________

Answer 30

Increases

Question 31

_______________ forces are bonds

Answer 31

Intramolecular forces