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Physics > Particles P3 > Flashcards

Particles P3 Flashcards

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1
Q

Density =

A

Mass
———-
Volume

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2
Q

What do we use to measure density of an irregular shaped object?

A

Eureka can

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3
Q

Solid to liquid

A

Melting

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4
Q

Liquid to gas

A

Evaporation

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5
Q

Solid to gas

A

Sublimation

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6
Q

Gas to liquid

A

Condensation

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7
Q

Liquid to solid

A

Freezing

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8
Q

Characteristics of solids

A

-Particles in a regular arrangement and vibrate about fixed positions
-Cannot be compressed

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9
Q

Characteristics of liquids

A

-Particles have no regular arrangement and are able to move past each other
-Cannot be compressed

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10
Q

Characteristics of gases

A

-Particles are far apart, move randomly at high speeds (high energy)
-Can be compressed

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11
Q

To melt or evaporate a solid, energy is required to overcome…

A

Electrostatic forces of attraction between particles

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12
Q

What is internal energy?

A

The sum of Kinetic and Potential energy of all particles in a substance

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13
Q

Temperature stays _________ during a change of state

A

Constant

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14
Q

When there is a change of state, which internal energy store increases

A

Potential

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15
Q

When temperature rises, which internal energy store increases

A

Kinetic

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16
Q

What is Specific Latent Heat?

A

The energy required to change the state of 1kg of a substance

17
Q

Equation for latent heat/energy required =

A

Mass x specific latent heat

18
Q

What is particle theory of gases

A

Gas pressure is a result of the particles colliding with the walls of the container, exerting a force outwards

19
Q

By heating a gas, you increase the particles’ kinetic energy, meaning…

A

They collide more frequently AND with greater force: so there is an increase in pressure
(assuming volume stays constant)

20
Q

Pressure and Volume are…

A

Inversely proportional. E.g. if one doubles, the other halves

21
Q

If a gas is compressed at a constant temperature…

A

Pressure x Volume = Constant

22
Q

To compress a gas you must…

A

Exert a force on it - do ‘work’ on the gas

23
Q

Unit of pressure

A

Pa (Pascals)

Physics (4 decks)

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