P3-Particles Models of matter

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  • Created by: Wynnie24
  • Created on: 10-04-19 17:06
Solids definition
Particles are held next to each other in fixed position. Least energetic state
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Liquids definition
Particles move about at random and are in contact with each other. More energetic than solids, but least energetic than gases
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Gases definition
Particles move about randomly and are far apart. They are much less dense than solids and liquids. Most energetic
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Changing sate definition
When a substance changes state, it's mass stays the same because the number of particles stays the same
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Physical change not chemical change
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Particles in gas are in constant random motion
When the temperature increases so does the kinetic energy and pressure
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Changing the temperature of a gas, held at a constant volume, changes the pressure of the gas
Motion related to temperature and pressure
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Kinetic energy in particles
KE = ½ x m x v2
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What is internal energy?
Energy stored inside a system by the particles that make up the system
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How to get internal energy
total kinetic energy plus the potential energy of all particles that make up the system
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What does heating do to internal energy?
It changes the energy of the system by increasing it. It also raises temperature of the system or changes the state
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Specific heat capacity temperature increase
Increase in temperature depends on the mass of the substance heated, type of material and energy input into the system
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What happens when a change of state happens?
If a change of state happens, the energy needed to change state is called latent heat.
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When a change of state occurs, energy supplied changes the energy stored (internal energy) but not the temperature
Specific latent heat of a substance is amount of energy required to change the state of 1kg of the substance with no change in temperature
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Specific latent heat of fusion (solid to liquid)
Specific latent heat of vaporisation (liquid to vapour)
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Other cards in this set

Card 2

Front

Particles move about at random and are in contact with each other. More energetic than solids, but least energetic than gases

Back

Liquids definition

Card 3

Front

Particles move about randomly and are far apart. They are much less dense than solids and liquids. Most energetic

Back

Preview of the back of card 3

Card 4

Front

When a substance changes state, it's mass stays the same because the number of particles stays the same

Back

Preview of the back of card 4

Card 5

Front

h

Back

Preview of the back of card 5
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