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Topic3:Particle Model Of Matter - Coggle Diagram
Topic3:Particle Model Of Matter
STATES OF MATTER
SOLIDS
particles can only vibrate about fixed positions
highest density
least kinetic energy
LIQUIDS
particles can flow over each other
GASES
lowest density
most kinetic energy
particles can move freely
DENSITY
mass per volume unit
P = M / V
measured in kg/m3
CHANGES OF STATE
MELTING: SOLIDS TO LIQUIDS
EVAPORATION: LIQUID TO GAS
CONDENSATION: GAS TO LIQUID
INTERNAL ENERGY
the total kinetic and potential energies of the particles in a system
mass is always conserved in changes of state
PHYSICAL CHANGES
if change is reversed the materials properties can be recovered
CHEMICAL CHANGES
cannot easily recover its original properties
SUBLIMATION
when a solid changes to a gas without becoming a liquid