Particles Model Of Matter(p) Flashcards
What are the 3 states of matter?
Solid
Liquid
Gas
What is the particle theory?
Considers each particle as a Small, Solid, inelastic sphere
What is a solid?
Has strong forces of attraction between bonds which hold them close together in a fixed position. In a definite shape and volume [can vibrate]
What is a liquid?
They have weak forces of attraction which make particles more free to move. Meaning they can change there shape, to flow to fit in. They are compact
(Definite vol.)
What is a gas?
Has very weak forces of Attraction
Which makes them free to move ‘constantly moving with random motion’ don’t keep definite volume and fill container
What happen when you heat up substances
Solid-liquid. Breaks their bonds
Liquid—gas. More energy is gained, meaning particles move around faster. Weakening the bonds. Reaching a boiling point. Breaking them.
What is temperature?
Measure of average internal energy of all the particles in a substance
What factors increases internal energy?
-Kinetic energy stores gaining energy
-heating objects, to rise object’s temperature
What happens when an object change state?
It does not increase in temperature!
What happens when a substance changes state?(NrG)
Energy provided Ed is used to weaken or break forces holding particles together/ or strengthens forces to form new bonds.
Hence temperature doesn’t increase or decreases
What is the specific latent heat for heating?
-energy required to change 1kg of particular substance from one state to another without changing temperature
What is specific latent heat for cooling?
Energy released by a change in state
What is specific latent heat of fusion?
Energy change when a substance changes between a solid and liquid
What is specific latent heat of vaporisation?
Energy change when substance change between liquid and gas
What is pressure?
Force exerted per unit of area
