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Chem 117 > Exam 3 > Flashcards

Exam 3 Flashcards

1
Q

Deposition

A

Gas&raquo_space; Solid

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2
Q

Sublimation

A

Solid&raquo_space; Gas

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3
Q

Condensation

A

Gas&raquo_space; Liquid

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4
Q

Vaporization

A

Liquid&raquo_space; Gas

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5
Q

Freezing

A

Liquid&raquo_space; Solid

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6
Q

Melting

A

Solid&raquo_space; Liquid

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7
Q

Water exception

A

Less dense solid than liquid

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8
Q

Ion Dipole

A

Ion + Polar Molecule

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9
Q

Dipole-dipole

A

Polar + Polar molecule

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10
Q

Hydrogen Bonds

A

Dipole-dipole with H and:

  • N
  • O
  • F
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11
Q

Dispersion forces

A

Weak IMFs

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12
Q

NON POLAR ELEMENT TRENDS

A

Bigger atoms&raquo_space; bigger forces&raquo_space; higher boiling point

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13
Q

IMF forces stronger in ____

A

long (chain) molecules than ball-like structures (tangles)

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14
Q

“Viscous”

A

Resistance to flow

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15
Q

Less IMFs, ____ vapor pressure

A

high (evaporates quicker)

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16
Q

Boiling Point

A

temperature at which vapor pressure equals atmospheric pressure

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17
Q

Normal boiling point

A

vapor pressure at 1 atm

18
Q

Must boil pasta for ____ time at high altitudes

19
Q

Network covalent structure

A

Crystal structures (Tetrahedral lattice)

20
Q

Ionic structure

A

Salts (cubic lattices)

21
Q

Molecular structure

A

Hexagonal lattices made of full molecules (i.e. water&raquo_space; Ice)

22
Q

Metallic structure

A

No lattice, big clump

23
Q

Alloys:

A

“Non-stoichiometric solid solutions”

24
Q

Substitutional compound

A

Solute metal substitutes positions of host metal

25
Q

Interstitial compound

A

Solute metal occupies interstitial sites in host lattice

26
Q

1 cal =

27
Q

Path function

A

dependent on path of system between start and finish

28
Q

Specific heat capacity

A

heat required to raise temp of one gram of substance by one degree C

29
Q

1st Law of Thermodynamics

A

The energy of the universe is constant

30
Q

2nd Law of Thermodynamics

A

The entropy of the uuniverse is increasing

31
Q

3rd Law of Thermodynamics

A

The entropy of a crystalline substance approaches zero as the absolute temperature approaches zero

32
Q

H,S: neg, pos

A

neg G: always spontaneous

33
Q

H,S: pos, neg

A

pos G: never spontaneous

34
Q

H,s: neg, neg

A

G depends: spontaneous at low temps

35
Q

H,S: pos, pos

A

G depends: spontaneous at high temps

36
Q

Integrated Rate Law: first order case

A

ln [At]/[Ao] = -kt

37
Q

Integrated Rate Law: second order case

A

1/At - 1/Ao = kt

38
Q

First order case graph

A

ln(conc)/time&raquo_space;> negative straight line

39
Q

Second order case graph

A

1/conc vs time&raquo_space;> positive straight line

40
Q

First order half life

A

t1/2 = ln2/k

41
Q

Second order half life

A

t1/2 = 1/k[Ao]

42
Q

Collision theory equation

A

ln(k1/k2) = (Ea/R)(1/T2 - 1/T1)

Chem 117 (13 decks)

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