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MCAT General Chemistry > Class 3 > Flashcards

Class 3 Flashcards

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1
Q

What are IMF dependent on?

A

BP
MP
Vaporizing Pressure

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2
Q

Which state has the strongest IMF?

A

solid has the strongest gas has the weakest

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3
Q

What is the terms for solid>liquid

A

Melting/fusion

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4
Q

What is the term for liquid to gas?

A

Vaporization

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5
Q

What is the terms from gas to liquid?

A

Condensation

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6
Q

What is the term from liquid to solid?

A

Freezing/crystallization

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7
Q

What is the term from solid to gas?

A

Sublimation

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8
Q

What is the term form gas to solid?

A

Deposition

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9
Q

What is melting and boiling point proportional to?

A

Pressure

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10
Q

What is the critical point?

A

Difference between liquid and gas doesn’t exist

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11
Q

What is the triple point?

A

When all 3 phases co exist in equilibrium

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12
Q

For water how does the relationship between melting point and Pressure look like?

A

MP is inversely proportional to pressure

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13
Q

What is temperature?

A

Average kinetic energy of a molecular motion

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14
Q

What could happen if you change the heat of a substance?

A
  1. Change phase (potential energy)
  2. Change temp (kinetic energy)
    - but cant to both at the same time
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15
Q

What are the 2 q equations?

A

q=n x deltaH of phase change

q=mc(change in T)

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16
Q

In a phase diagram what is happening when there is a slope and a plateau?

A

Slope: no change in IMF, no breaking IMF just increasing temp

Plateau: Changing IMF and breaking IMF, no change in temp

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17
Q

What is the specific heat of water?

A

4.18 J/gC

18
Q

What is heat capacity?

A

Specific object or system J/C or J/K

19
Q

What is density?

A

How condensed a substance is

20
Q

What is the equation for density?

A

p=m/v

21
Q

For density how does external P, T and IMF relate to density?

A

External P: directly proportional to density
External T: is indirectly proportional to density
IMF: directly proportional to density

22
Q

What is the vapour pressure?

A

Force exerted by gas particles for a solid to liquid

-not dependent on other substances in a closed or open system

23
Q

For vapour pressure how does external P, T and IMF relate to vapour pressure?

A

External P has no effect on VP
External T: if increase temp it increases evaporation and increases VP
IMF: if IMF increases it lowers evaporation and decrease PV

24
Q

Whaat is BP?

A

When condensation/vaporization phase transition occur

-when VP=Patm

25
Q

For BP how does external P, T and IMF relate to BP?

A

External P directly proportional to BP
IMF directly proportional to BP
External T no effect

26
Q

What is melting/Freezing?

A

MP and FP have the same value

27
Q

For MP/FP how does external P, T and IMF relate to MP/FP?

A

External P: directly proportional too MP/FP

IMF: directly proportional to MP/FP

28
Q

What is the difference between solute and solvent?

A

Solute: lower quantity
Solvent: increased quantity

29
Q

What happens when solid and ligand are in water?

A

solubility is proportional to temp and not affected by pressure

30
Q

What happens when gas solutes are in water?

A

Solubility is proportional to temp and are affected by pressure

31
Q

What happens when there are electrolytes in water?

A

Certain core always going to be soluble

32
Q

What is the kinetic molecular theory of gases?

A

Ideal gas has 0 IMF

  • has particles with negligible volume compared to their container size
  • has an average KE proportional to temp
  • has elastic collision where no KR is lost between particles and container wall *this creates pressure
33
Q

What is avogadros law?

A

V of ideal gas is proportional number of particles in the container at given temp and pressure regardless of the gas
-V proportional to mols

34
Q

How much does one mol of any gas equal?

A

Occupies 22.4l=L at STP

35
Q

What is boils law?

A

P inversely proportional to V at constant mol (n) and T

36
Q

What is Charles law?

A

T proportional to V at constant mol and P

37
Q

What is Gay-Lussae law?

A

P proportional to T at constant mol and V

38
Q

What is the ideal gas law?

A

Is a snap shot of the gas
PV=nRT
-R=0.08L/atm/mK

39
Q

What is daltons law?

A

Total P of a gas mix= the sum of the partial pressures

pp of gas are proportional to mol fraction

40
Q

What is grams law?

A

Rate of diffusion or effusion of a gas in inversely treated to the root of its molar mass

  • heavy particles move slow
  • lighter particles move quick
41
Q

What is the difference between diffusion and effusion?

A

diffusion: movement go gas through other gas

Effusion: Movement of gas into vacuum (where P=0atm)

42
Q

What do we always have to remember with grams law?

A

Pideal is always greater than Preal

Videal is alway greater than Vreal

MCAT General Chemistry (3 decks)

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