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Physics GCSE AQA > Topic 3 - Particle Model Of Matter > Flashcards

Topic 3 - Particle Model Of Matter Flashcards

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1
Q

Density =

A

Mass/volume

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2
Q

What are the three states of matter?

A

Solid, liquid, gas

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3
Q

What are the forces of attraction like in solids?

A

Strong

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4
Q

What are the forces of attraction like in liquids?

A

Weak

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5
Q

What are the forces of attraction like in gases?

A

Almost non-existent

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6
Q

Which state of matter generally has the highest density?

A

Solids

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7
Q

What is internal energy?

A

The energy stored by particles in a system

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8
Q

What types of energy can internal energy be?

A

Kinetic and potential

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9
Q

Solid to liquid

A

Melting

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10
Q

Liquid to solid

A

Freezing

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11
Q

Liquid to gas

A

Boiling/ evaporating

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12
Q

Gas to liquid

A

Condensing

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13
Q

Solid to gas

A

Sublimation

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14
Q

Is changing state a physical or chemical change?

A

Physical

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15
Q

Does mass chance in change of state?

A

No

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16
Q

Do the number of particles change in change of state

A

No

17
Q

On a time temperature graph of a substance, what do the gradients represent?

A

Heating up

18
Q

On a time temperature graph of a substance, what do the flat parts represent?

A

Melting and boiling points

19
Q

Why does the temperature temporarily stop rising when the substance reaches its melting or boiling point?

A

Because the energy is going into breaking the intermolecular bonds rather than into changing the temperature

20
Q

What is latent heat?

A

The energy needed to change the state of a substance

21
Q

What is the specific latent heat of a substance?

A

The amount of energy needed to change the state for 1kg

22
Q

The specific latent heat for changing between solid and liquid is called…

A

Specific latent heat of fusion

23
Q

The specific latent heat for changing between liquid and gas is called…

A

Specific latent heat of vaporisation

24
Q

Specific latent heat =

A

Energy/mass

25
Q

What are the units for specific latent heat?

A

J/kg

26
Q

What happens when you increase the temperature of a gas?

A

The speed of its particles increase

27
Q

What happens when gas particles collide with a surface?

A

They exert pressure

28
Q

Faster particles result in?

A

More collisions

29
Q

Pressure and volume are _____ proportional

A

Inversely

30
Q

For a gas of a fixed mass and temperature, pressure x volume =

A

Constant

31
Q

If the pressure inside a container is greater than the pressure outside, what happens?

A

The container may expand

32
Q

If the pressure outside a container is greater than the pressure inside a container, then what happens?

A

The container may compress

Physics GCSE AQA (3 decks)

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