Chpt 10 and 11

Question 1

describe dispersion forces (or london forces)

Answer 1

• they are super weak
• temporary dipoles
• all atoms, ions and molecules
• high MW, stronger attractions
• shape could matter

Question 2

describe dipole-dipole attractions

Answer 2

• results of permanent dipole
• it depends if there is polar or non-polar compound

Question 3

describe hydrogen bonding

Answer 3

• its a really strong type of dip-dip
• occurs only for HF, HO, or HN

Question 4

ion-dipole reactions

Answer 4

• reason most ionic compds dissolve in water

Question 5

definition: ability of two liquids to mix (and not separate into layers)
- polar w/polar
- nonpolar w/nonpolar

Answer 5

miscibility

Question 6

definition: sticks to other things

Answer 6

adhesive

Question 7

definition: sticks together

Answer 7

sticks together

Question 8

What attractions happen with mercury in a glass

Answer 8

cohesive properties

Question 9

What attractions happen with water in a glass

Answer 9

adhesive properties

Question 10

What happens with surface tensions

Answer 10

the molecules on the surface are attracted inward and form a skin on the surface

Question 11

In surface tensions as IMF become higher what happens

Answer 11

the surface tensions becomes stronger

Question 12

in surface tensions as temperature rises what happens

Answer 12

it become weaker…the molecules are moving quicker

Question 13

definition: measure of resistance to flow

Answer 13

viscosity

Question 14

What is the trend for viscosity when IMF or Temp rises?

Answer 14

When IMF increases viscosity increases and when temp increases viscosity decreases

Question 15

definition: flow up a tub(against gravity)

Answer 15

capillary action

Question 16

vaporization is what phase change

Answer 16

liquid to gas

Question 17

condensation is what phase change

Answer 17

gas to liquiz

Question 18

As IMF increases what happens to the rate of vaporization?

Answer 18

It is increases and is harder to vaporize

Question 19

What is happenig in Le Chatlier’s Principle

Answer 19

liquid + heat energy –><– vapor(double arrow)

Question 20

In Le Chatlier’s Principle what would happen if you add heat

Answer 20

it would shift to the right and there would be more vapor

Question 21

In Le Chatlier’s Principle what would happen if you cool it?

Answer 21

It would shift to the left and add more liquid

Question 22

What are the trends for vapor pressure

Answer 22

• As IMF is greater VP decreases
• As Temp increases VP will increases

Question 23

What is the definition of vapor pressure

Answer 23

pressure of vapor of a liquid in equilibria w/ liquid phase in a closed container

Question 24

what is the definition of boiling points

Answer 24

The temp at which v.p. of a liquid = the applied pressure

Question 25

boiling point trends

Answer 25

- As IMF is greater BP will increase - As external P greater BP will increase

Question 26

sublimation is what phase change?

Answer 26

solid --> gas

Question 27

deposition is what phase change?

Answer 27

gas --> solid

Question 28

definition: amount of heat required to raise the temp of 1 gram of substance by 1C

Answer 28

specific heat

Question 29

What is melting points definition

Answer 29

the temp that the rate of melting is the same as the rate of freezing

Question 30

definition: amount of heat required to convert 1g solid to liquid @ mp

Answer 30

heat of fusion

Question 31

definition: amt of heat required to convert 1g liquid to vapor @ b.p.

Answer 31

heat of vaporization

Question 32

What is the equation for specific heat?

Answer 32

mass * specific heat * change in temperature

Question 33

these are characteristics of which solids? - strong ion-ion interactions - high m.p. and b.p. - solids @ room temp - dissociate in water - hard & brittle - dont conduct electricity

Answer 33

ionic solids

Question 34

These are the characteristics of which type of solids - hard - malleable & ductile - conduct electricity & heat as solids and liquids - usually very dense - range of mp

Answer 34

metallic solids

Question 35

these are characteristics of which solids - high mp - very hard and brittle - most do not conduct electricity - undending network of covalent bonds

Answer 35

covalent network solids

Question 36

these are characteristics of which type of solids - low mp - soft - poor conductor of heat and energy - frozen molecule cmpds

Answer 36

molecular solids

Question 37

an examples of a molecular solid is what?

Answer 37

H2O(s)

Question 38

an example of a covalent network solid is what?

Answer 38

diamond

Question 39

What are the different forms of carbon

Answer 39

- graphite (sp2) - diamond (sp3) - fullerenes(sp2) - nanotubes(sp2)

Question 40

definition: different bonding modes

Answer 40

allotropes