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Flashcards in Ch 11 Deck (59)
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1

what elements are liquid?

bromine and mercury

2

if attractive forces exceed the average kinetic energy, the substance will exist in its

condensed phase (liquid or solid)

3

to go from condense to gas

average kinetic energy must be greater than the IMF to go from condensed to gas

4

ideal gases

has negligible forces between molecules, and negligible volume

5

ideal vs real gases

at low temps, they are the same but at higher temps, they deviate

6

a value of van Der waals

stronger IMF is larger a

7

b value of van Der waals

larger mol is larger b

8

normal anything

is at 1 atm

9

vaporization

convert liquid to a gas

10

condensation

gas to liquid

11

large imfs

substance must be raised to a high temp so molecules have enough kin energy to melt or vaporize

12

small imfs

substance must be cooled to a low temp so its molecules can condense

13

when drawing IMFs

must have two molecules to show

14

non polar bonds

ch, sih and csi

15

h bonding requirements

FON and H

16

inter vs intra

intermolecular: is between other mol
intra: covalent bonds

17

liquid properties

surface tension, capillary action, viscosity,

18

temperature graph molecule draw

x= kinetic energy
y= number of molecules

higher temp will be higher near the end but lower at the beginning

19

vapor pressure

pressure of vapour above the condensed phase. DEPENDENT ON TEMPERATURE
high imp is low
intensive property (independent of density)
increases with increasing temperature

20

molecular solids

- can contain the molecule
these are all the IMF molecules

21

network solids (covalent)

have very high melting points
- like diamond, silicon etc.

22

diamond

3d of carbon

23

graphite

2d and brittle

24

metallic solids

delocalized sea of nuclei that are malleable

25

ionic solids

must be electrically neutral, ionic compounds

26

superconductors

carry immense current without resistance losses

27

crystalline solids

solids that have symmetrical patterns

28

amorphous solids

irregular in structure with no pattern

29

amorphous solids vs liquids

amorphous solids resemble liquids in that their molecules are not organized

30

properties of crystals

1. parallel faces and edges with good angles
2. fragmentation occurs along crystal edges. small crystals have same angles as larger ones
3. has a high degree of symmetry

31

unit cells

smallest repeating unit

32

simple cubic

1/8 on each and 1 total

33

body centred cubic

1/8 edge, 1 in centre and total 2

34

face entered cubic

1/2 at each centre, 1/8 per corner total 4

35

deposition is

gas to solid

36

solid to liquid

is melting/ fusion

37

when something becomes more condensed phase

energy is released

38

going from solid to liquid vs liquid to solid

reverse signs

39

heat of fusion and heat of freezing relate

equal and opposite

40

c of water

4.184

41

triple point

temperature and pressure at which s,l and g phases are all equilibrium

42

critical point

the temperature and pressure at which a gas can no longer be condensed

43

drawing a phase diagram

x= temperature
y= pressure

44

phase diagram for water

has a slightly negative slope of the freezing point line (indicates that the solid is less dense than the liquid)

45

in most phase diagrams

- high pressure will make solid
- solid is more dense than liquid
- molecules are closest in solid phase
- solid liquid coexistence line has a positive slope

46

in water phase diagram

- high pressure will cause solid to become liquid
- solid liquid line is negative
- solid is less dense than liquid
- molecules are closest in liquid phase

47

PV/NRT at ideal gas?

equals 1

48

surface tension

cohesive force, pulls gas back into the liquid
high imf is high surface tension

49

capillary action

adhesive forces between water and other substance

50

evaporation

molecules of a liquid with sufficient KE to overcome IMF will escape into the gas phase

51

types of solids

- molecular solids
- metallic solids
- network solids
- ionic solids

52

solids that are symmetrical

crystaline
- diamond, sugar, salt

53

solids that are irregular

amorphous
glass, wax, cotton candy

54

quartz

crystalline form of silicon dioxide

55

silica

amorphous form of silicon dioxide

56

viscosity

high viscosity is high imf

57

pico

10^-12

58

MILI

10^-3

59

MICRO

10^-6