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Chemistry II > Quiz 2 > Flashcards

Quiz 2 Flashcards

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1
Q

What is the transition from liquid to gas?
Is this phase change endothermic or exothermic?
ex: when a rain puddle disappears after a few days

A
  • Vaporization
  • ENDOthermic
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2
Q

What is the transition from gas to liquid?
Is this phase change endothermic or exothermic?

A
  • Condensation
  • EXOthermic
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3
Q

What is the transition from solid to gas?
Is this phase change endothermic or exothermic?

A
  • Sublimation
  • ENDOthermic
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4
Q

What is the transition from gas to solid?
Is this phase change endothermic or exothermic?

A
  • Deposition
  • EXOthermic
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5
Q

What is the transition from liquid to solid?
Is this phase change endothermic or exothermic?

A
  • Freezing
  • EXOthermic
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6
Q

What is the transition from solid to liquid (we have to heat a solid until molecules have sufficient energy to PARTIALLY overcome the forces holding them in a fixed position)? Is this phase change endothermic or exothermic?

A
  • Melting
  • ENDOthermic
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7
Q

What is the temperature at which vapor, liquid, and solid phases of a substance are at equilibrium?

A

Triple point

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8
Q

What is the temperature and pressure ABOVE which a gas cannot be condensed into a liquid?

A

Critical point

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9
Q

What is a homogenous mixture of two or more substances (ex: air)?

A

Solution
- Homogeneous
- Physical state of solution=physical state of solvent
- Solute WON’T settle out
- Composition can be varied (solubility)

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10
Q

What is a component present at significantly HIGHER concentrations (ex: N2)?

A

Solvent

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11
Q

What is a component present in LESSER concentrations (ex: O2)?

A

Solutes

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12
Q

Why do solutions form/what contributes to solution formation?

A
  1. Decrease in internal energy
  2. Increased dispersal of matter
    These two favor, but does not guarantee
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13
Q

What is it called where IMF between solute AND solvent are NO different than the IMF in separate components (ex: CH3OH and CH3CH2OH)

A

Ideal solution(s)

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14
Q

________ = Ideal solution

A

Similar properties= Ideal solution

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15
Q

What is the maximum concentration of SOLUTE in a particular SOLVENT that can be achieved under given conditions?

A

Solubility

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16
Q

If the solute concentration is EQUAL to solubility, it is _________? (solubility factor)?

A

Saturated

17
Q

If the solute concentration is LESS than solubility, it is __________? (solubility factor)?

A

Unsaturated

18
Q

If the solute concentration is GREATER than solubility, it is ___________? (solubility factor)?

A

Supersaturated

19
Q

Gas solubility generally _______ with increasing temperature (gases in liquids)?

A

Decreases

20
Q

What is it called when there is an INFINITE mutual solubility (ex: ethanol and water) (liquids in liquids)?

A

Miscible

21
Q

What is it called when liquids do NOT mix (ex: oil and water) (liquids in liquids)?

A

Immiscible

22
Q

What is it called when there is a MODERATE solubility (ex: water and bromine) (liquids in liquids)?

A

Partially miscible

23
Q

Solid solubility generally _______ with increasing temperature (solids in liquids)?

A

Increases

24
Q

What are properties of solutions are DIFFERENT than pure substances?

A

Colligative properties

25
Q

What is this ratio:
moles of particles in solution: moles of formula units?

A

Van’t Hoff Factor

26
Q

What are compounds that are formed when two NONMETALS react with each other?
all covalent bond’s VHF=1

A

Covalent Compound

27
Q

What are compounds that are usually formed when a METAL reacts with a NONMETAL?

A

Ionic compound

Chemistry II (12 decks)

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