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Physics Topic 3 - Particle Model of Matter
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Physics Topic 3 - Particle Model of Matter
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Physics Topic 3 - Particle Model of Matter✅
chemical changes- changes to the chemical structure of a substance
(when the changes are reversed, the substance doesn’t usually revert back
to its original structure)
condensation- ✅the changing from a gas to liquid (cooling of gas)
Density-✅the mass per unit volume of an object
evaporation-✅the changing from a liquid to a gas (heating of liquid)
freezing-✅the changing from a liquid to a solid (cooling of liquid)
gas temperature relationship with kinetic energy-✅it is directly proportional
to the average kinetic energy of its molecules
✅
internal energy- the energy stored by the atoms and molecules that make
up a system
kinetic energy + all potential energies of particles = internal energy
latent heat-✅the energy required for a substance to change state
✅the changing from solid to liquid (heating of solid)
melting-
pascals-✅unit of pressure (equal to a force of one N acting perpendicular
to an area of 1m^2)
✅
physical changes- changes to the physical properties of a substance
which can be reverse
pressure- ✅force acting perpendicular to a surface, per unit area
specific heat capacity-✅amount of energy needed to increase the
temperature of 1kg of a given substance by 1 degree
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