P3 Flashcards
Particle model
what is the particle arrangement in a solid?
- Packed in a regular structure
- Strong forces hold in place so cannot move
what is the particle arrangement in a liquid?
- close together, forces keep contact but can move about
what is the particles arrangement in a gas?
- separated by large distances
- weak forces so constantly randomly moving
what is the equation to find density?
mass DIVIDED BY volume
what is internal energy?
The total kinetic energy and potential energy of all the particles in a system
what is it called when a solid turns into a liquid?
melting
what is it called when a liquid turns into a gas?
boiling / evaporating
what is it called when a gas turns into a liquid?
condensation
what is it called when a solid turns into a gas?
sublimation
what does the conservation of mass state?
When substances change state, mass in conserved
what is the unit for density?
kilograms per metre cubed (kg/m3)
what is the unit for mass?
Kilograms (kg)
what is the unit for volume?
metres cubed (m3)
What is the unit for specific latent heat?
joule per kilogram (J/kg)
what is the unit for change in thermal energy?
Joules (J)
what is the equation for working out change in thermal energy?
mass x specific heat capacity x temperature change
what is specific heat capacity?
Energy needed to raise 1kg of substance by 1 degree Celsius
what is specific latent heat?
Energy needed to change 1kg of a substance’s state
what is specific latent heat of Fusion?
Energy needed to change 1kg of a solid into 1kg of liquid at the same temperature
what is specific latent heat of vaporisation?
Energy needed to change 1kg of liquid into 1kg of gas at the same temperature
