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Flashcards in Intermolecular Forces Deck (31):
1

__________________ forces are forces of attraction between molecules

Intermolecular

2

The forces of attraction between a ion and a polar molecule

Ion-dipole

3

Some ionic compounds do not __________ in water

Dissolve

4

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

Stronger

5

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

Dipole-dipole

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

F, O, or N

7

Molecules with hydrogen bonds have a ____________ boiling point

Higher

8

The stronger the bond the ____________ the potential energy

Lower

9

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

Dipole-induced Dipole

10

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

Larger

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

induced dipole-induced dipole, aka London dispersion forces

12

Larger species with more electrons are more ____________

Polarizable

13

The presence of pi bonds ___________ polarizability

Increases

14

Why are heat of fusion values always positive

Melting is an endothermic process

15

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

Pressure

16

Vapor pressure increases as temperature ____________

Increases

17

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

Weaker

18

When does a liquid boil?

When it's vapor pressure equals the atmospheric pressure

19

The boiling point decreases as the elevation _________

Increases

20

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

Sublimation

21

Ionic compounds have a very ______ vapor pressure

Low

22

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

Surface tension

23

Liquids with stronger intermolecular forces have __________ surface tensions

Greater

24

Intermolecular attractions between the liquid and the gas

Adhesive forces

25

Intermolecular attractions between molecules in the liquid

Cohesive forces

26

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

Surface tension

27

Capillary action leaves a small _________ in the tube

Meniscus

28

The measure of liquids resistance to flow

Viscosity

29

Viscosity increases as the strength of intermolecular forces ____________

Increases

30

Viscosity decreases as temperature ___________

Increases

31

_______________ forces are bonds

Intramolecular forces