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Physics > Particle Model Matter > Flashcards

Particle Model Matter Flashcards

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1
Q

solids

A

Particles close together and arranged in a regular pattern, vibrate but don’t move

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2
Q

Liquids

A

Close together but particles not arranged in a regular pattern and can move around

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3
Q

Gases

A

Particles very far apart and not arranged in any pattern and move around rapidly

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4
Q

Density

A

Density (kg/m cubed) = mass (kg)/ volume (m cubed)

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5
Q

Density for a solid

A

High density because particles are packed closely together they gave a lot of mass

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6
Q

Liquid density

A

Usually have a high density because the particles are close together liquids have a lot of mass for their volume

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7
Q

Gases density

A

Low because particles are very far apart so gasss have a small mass for their volume

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8
Q

Polystyrene

A

A solid but has a low density because it has a very open structure and full of air spaces so it has a small mass for its volume

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9
Q

Density

A

The mass for a given volume

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10
Q

What is displacement method ?

A

Used to calculate density of irregular objects

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11
Q

Eureka can

A

Has a spout so water can flow out. used to measure the volume

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12
Q

Internal energy

A

Energy stored in a system by the particles

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13
Q

If u heat a solid…

A

We increase the internal energy

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14
Q

If we cool the gas down….

A

We reduce the internal energy

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15
Q

Change of state

A

Melting, boiling, freezing, condensation

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16
Q

A solid turning directly to gas

A

Sublimation

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17
Q

When changes of state take place mass is always…

A

Conserved. Not adding or taking away any particles

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18
Q

Changes of state are what changes?

A

Physical changes(not chemical changes)

19
Q

Evaporation

A

When a liquid turns to a gas but only on the surface of the liquid

20
Q

Regular objects

A

Easy to measure

21
Q

Irregular objects

A

Aren’t easily measurable

22
Q

Internal energy

A

The energy stored in a system of particles

Total kinetic energy and potential energy of all the par lies that make up a system

23
Q

Particles include

A

Atoms and molecules

24
Q

If we heat a solid

A

We increase internal energy and some point it turns to liquid

25
Q

If we heat the liquid we continue to

A

Increase internal energy and at some point it’ll turn to gas

26
Q

If we cool gas down then it means

A

We decrease internal energy and at some point it’ll turn to liquid (condensation)

27
Q

If we cool down the liquid further then we

A

Reduce the internal energy even more and it’ll turn to a solid (freezing)

28
Q

Sublimation

A

Turning solid directly to a gas

29
Q

When changes of state takes place mass is always

A

Conserved (not adding and taking away any particles)

30
Q

What changes are changes of state?

A

Physical changes

31
Q

Specific heat capacity

A

The amount of energy required to raise the temperature

32
Q

Specific heat capacity (J/kg degrees)

A

c

33
Q

Change in thermal energy

A

(J)

34
Q

1000J =

A

1KJ

35
Q

Specific latent heat

A

Amount of energy required to change the state of 1kg of the substance with no change in temp

36
Q

Specific latent heat of fusion

A

Energy required to change 1kg of a substance from a solid to liquid with no change in temp

37
Q

Specific latent heat of vaporisation

A

Th energy required to change 1 kg of a substance from a liquid to a vapour with no change in temp

38
Q

Specific latent heat

A

(J/Kg)

39
Q

Energy for a change in state

A

(J)

40
Q

Increase number of collisions in gas particles or energy of each collisions leads to….

A

Increase pressure

41
Q

One way to increase energy of each collision or increase number of collisions

A

Increasing temp

42
Q

The temp of a gas is related to …

A

Average kinetic energy of the particles

43
Q

At low temp particles have lower…

A

Kinetic energy so fewer collisions per sec (lower energy collisions)

44
Q

At high temp particles have higher…

A

Kinetic energy so there’s more collisions per sec (higher energy collisions)

Physics (5 decks)

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