Molecules and matter
- Created by: Epic Al
- Created on: 03-07-22 10:34
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- Molecules and Matter
- Density
- p = m/v
- mass(kg) / volume(m^3)
- unit: kg/m^3
- States of matter
- changing state
- Liquid
- cools to solid
- heated to gas
- Solid
- melts to liquid
- sublimation to gas
- Gas
- condenses to solid and gas
- Liquid
- solid
- particles in fixed positions
- least energetic
- Vibrate constantly
- Liquid
- random movement
- in contact with each other
- more energetic than solid
- Gas
- move randomly and far apart
- most energetic
- changing state
- changes of state
- energy required
- flat section of a temperature time graph gives the melting/ boiling point
- internal energy
- increasing temperature increase internal energy
- temperature rises, kinetic energy of the particles rise
- as it melts or boils the potential energy increases
- Specific latent heat
- latent heat is the energy needed for a substance to change its state without changing its temperature
- specific latent heat of fusion
- vaporisation
- energy needed to melt or boil 1kg of a substance without changing temperature
- E = m x L
- energy = mass x latent heat of fusion
- Density
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