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Chem 101 > INTERMOLECULAR FORCES > Flashcards

INTERMOLECULAR FORCES Flashcards

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1
Q

The fundamental difference between states of matter is?

A

distance between particles

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2
Q

Types of states

A

liquid
gas
solid

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3
Q

Properties of a gas?

A

disorder
empty space
rapid diffusion

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4
Q

Properties of liquid?

A

Some disorder
particles move
some empty space (particles closer)
slow diffusion

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5
Q

Properties of solid?

A

ordered
no particle movement
no diffusion

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6
Q

What are the 2 factors the state of a substance depends on?

A

kinetic energy of particles

strength of attraction between particles

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7
Q

intermolecular vs intramolecular?

A

INTER-forces that exist BETWEEN molecules

INTRA-forces that exist WITHIN molecules

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8
Q

What is stronger? intermolecular forces or intra?

A

intramolecular forces are much stronger.

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9
Q

What force controls boiling point, viscosity, vapour pressure etc?

A

Intermolecular forces

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10
Q

Another term for intermolecular forces?

A

Van der waals forces

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11
Q

What does the strength of intermolecular forces depend on?

A

polarity

-more polar=stronger attraction between species

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12
Q

intermolecular forces are ?

A

inversely proportional to distance squared

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13
Q

What are ion-dipole forces?

A

attractive force resulting in electrostatic attraction between ion and neutral molecule with dipole.
responsible for ionic substances dissolving polar solvents

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14
Q

what are dipole-dipole forces?

A

partially negative ends of polar molecules are attracted to partially positive ends of nearby polar molecules

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15
Q

the more electronegative the element bound to hydrogen,

A

the greater the dipole moment, dipole-dipole interactions and mp&bp

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16
Q

What is hydrogen bonding?

A

primarily electrostatic force of attraction between a hydrogen atom which is covalently bound to a more electronegative atom

17
Q

What are London-Dispersion forces?

A

weakest intermolecular force
all atoms/molecules are weakly attracted through L-D forces
present in ALL molecules

18
Q

how does shape affect L-D forces?

A

long and skinny molecules have strong L-D forces compared to short and broad ones

19
Q

as molecular weight increases

A

boiling point increases

20
Q

Large molecules have?

more elcetrons=

A

large molecules = stronger dispersion forces= higher boiling points
More electrons= higher surface area= larger dispersion forces

21
Q

what are the force strengths?

A

GREAT ionic bonding-Ion-dipole-hydrogen bonding-Dipole/dipole-Dispersion LEAST

Chem 101 (7 decks)

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