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Physics - Particle Model of Matter (2) - Coggle Diagram
Physics - Particle Model of Matter (2)
Internal Energy
Total energy that its particles have in their kinetic and potential energy stores
heating system transfers energy to its particles, increasing internal energy
change in temperature / change in state
change in state
if substance is heated enough
break bonds between particles
increasing energy in potential energy stores of particles
cooling system reduces energy in kinetic stores
bonds form between particles
reducing energy in potential energy stores
Changes of State
physical change (changes form)
number of particles do not change
Changes of State
Solid -> Liquid
melting
Liquid -> Solid
freezing
Gas -> Liquid
condensing
Liquid -> Gas
boiling / evaporating
Solid -> Gas
sublimating
Specific Latent Heat
Latent Heat
when substance is melting / boiling
energy still transferred to particles heating
internal energy increases
energy used for breaking bonds, not to raise temperature
when substance condensing / freezing
bonds form between particles releases energy
decreases internal energy
temperature doesn’t go down until all substance has changed state
Energy transferred when there is a change of state
Energy needed for a 1kg mass to Change State (without changing temperature)
different for different materials
Specific Latent Heat of Fusion
SLH for changing between solid and liquid
Specific Latent Heat of Vaporisation
SLH for changing between liquid and gas
E = mL