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QUÍMICA > U.4 INTERMOLECULAR FORCES > Flashcards

U.4 INTERMOLECULAR FORCES Flashcards

1
Q

How is name the pass from solid to liquid? it absords or expulse energy?

A

Fusión, absorbs E

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2
Q

How is name the pass from solid to gas? it absords or expulse energy?

A

Sublimination, absorbs E

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3
Q

How is name the pass from gas to liquid? it absords or expulse energy?

A

Condensation, expulse E

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4
Q

How is name the pass from gas to solid? it absords or expulse energy?

A

Deposition, expulse E

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5
Q

How is name the pass from liquid to gas? it absords or expulse energy?

A

Vaporization, absobs E

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6
Q

How is name the pass from liquid to solid? it absords or expulse energy?

A

Solidification, expulse E

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7
Q

Intermolecular forces have low or high E?

A

Low E

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8
Q

What are the types of intermolecular forces?

A
  1. Van der waals forces
  2. Hydrogen bonding
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9
Q

What are the types of Van Der Waals forces?

A
  1. Dipole-dipole forces
  2. Dipole- induce dipole forces (London dispersion forces)
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10
Q

Dipole-dipole forces are electrostatic interacction between..

A

2 polar molecules

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11
Q

At more dipole moment…

A

more dipole-dipole force

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12
Q

The effect of dipole-dipole forces is added to…

A

The effect of London dispersion forces.

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13
Q

The dipole-induce dipole forces are electrostatic interactions between a…

A

a polar molecule and a non-polar molecule with a induce dipole(can happend to all molecules)

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14
Q

The london dispersion forces increase with the….

A

molecular heigh

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15
Q

Which atoms at bonding with H create a especial kind of dipole?

A

N, O, F

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16
Q

The hydrogen bonding is a…

A

special type of dipole-dipole interaction, between H and a highly electronegative atom.

17
Q

The intensity of london dispersión forces is determine for how…

A

easy is to break the induce dipole

18
Q

How is name the easiness in which the e- distributeion on a molecule can be distorted?

A

Polarizability

19
Q

At larger molecule…

A

larger polarizability

20
Q

At more london dispersión forces….

A

more polarizability

21
Q

At higher boiling points…

A

more intermolecular forces

22
Q

How do we know which substance the intermolecular forces are stronger?

A
  • When substances with very different molecular weights are compared, London dispersion forces will be more important than dipole-dipole forces.
  • When substances with similar molecular weights are compared, dipole-dipole forces will add up to the London dispersion forces, increasing the boiling and melting points.
  • If hydrogen bonds are present, they are more important than the dipole-dipole forces.
23
Q

In what types de solids clasificate?

A
  • AMORPHOUS SOLIDS
  • CRUSTALLINE SOLIDS
24
Q

The amorphous solids are solids in which its particles….

A

do not have an order structure

25
Q

The crystalline solids are solids in which its particles….

A

have a ordered and regular structure

26
Q

Types of solids?

A
  1. Molecular
  2. Extended covalent network
  3. Metallic
  4. Ionic
27
Q

Molecular soilds are…

A

discrite molecules

28
Q

What are the interactions between units of molecular solids?

A

Vander waals forces and hydrogen bonds

29
Q

What are the physical properties of molecular solids?

A
  • Fragile crystals
  • Low BP and MP
  • Insulators
30
Q

The extended covalent network are ….

A

covalent polymers

31
Q

What are the interactions between units of extended covalent network?

A

Covalent

32
Q

What are the physical properties of extended covalent network?

A
  • Hard crystals
  • High BP and MP
  • Insulators or semiconductors
33
Q

The metallic solids are…

A

closed packings

34
Q

What are the interactions between units of extended metallic solids?

A

metallic bonds

35
Q

What are the physical properties of metallic solids?

A
  • Some softs, some hard (depend on the metal-metal bond)
  • MP variable
  • Electrical conductors
36
Q

The ionic metals are…

A

aions and cations in a 3D network

37
Q

What are the interactions between units of extended ionic solids?

A

ionic bonds

38
Q

What are the physical properties of ionic solids?

A
  • Hard, fragile
  • High MP
  • Insulators. Conductors in molten state.

QUÍMICA (2 decks)

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