Particle model of matter Flashcards

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1
Q

How do you find density (kg/m³)?

A

Mass (kg / volume (m³)

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2
Q

What is density?

A

A measure of the compactness of a substance

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3
Q

What is used to find the density of a solid object?

A

A eureka can

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4
Q

What is internal energy?

A

The energy stored by the particles that make up a system

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5
Q

What happens when particles are heated up?

A

It transfers energy to it’s particles, so they gain energy to their kinetic stores and and move faster, increasing the internal energy

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6
Q

What can happen when temperature changes?

A

This can result in a change in state, depending on the mass of the substance, it’s specific heat capacity and the energy input

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7
Q

When does a change of state occur?

A

When the particles have enough energy in their kinetic stores to break the bonds holding them together, or they don’t have enough energy to stop the bonds from forming

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8
Q

What are the the changes of state?

A

Freezing, melting, boiling/evaporating, condensing and sublimating

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9
Q

What is specific latent heat?

A

The amount of energy needed to change 1 kg of a substance from one state to another without changing it’s temperature

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10
Q

What is the SLH for changing between a solid and a liquid called?

A

Specific latent heat of fusion

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11
Q

What is the SLH for changing between a liquid and a gas called?

A

Specific latent heat of vaporisation

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12
Q

How do you work out the energy needed or released from a change of state?

A

Mass x specific latent heat

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13
Q

Finish this sentence: the higher the temperature

A

The higher the average energy in the kinetic energy stores of the particles in the gas

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14
Q

What is outward gas pressure (in a sealed container)?

A

The total force exerted by all of the particles in the gas on a unit area of the container walls

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15
Q

What is the relationship for a gas of fixed mass at constant temperature?

A

Pressure (Pa) x volume (m³) = constant

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16
Q

What does the pressure of a gas cause?

A

A net outward force at right angles to the surface of it’s container