P3
Which theory attempts to explain the three states of matter
Particle (kinetic) theory
The particle model (sometimes also called the kinetic model) has 3 main assumptions
These are that the particles are
Small
Inelastic
Spheres
In solids, strong attractive forces hold the particles in place, so that they can only ______ in position.
vibrate
When a solid is heated, energy is transferred to the particles' ________ energy stores, which causes them to vibrate faster
kinetic
If the gas is trapped within a container that cannot ______ , it means that the _______ of the gas is fixed, and so the _____ inside the container increases
expand
volume
pressure
In a closed system, changes in state won't change the mass at all
The number of particles remains the same
When heat is lost, the particles won't have enough energy to overcome forces of attraction. Thus, bonds start to form between the particles
Condensing
What happens to the temperature of a substance whilst it changes state
The temperature remains constant
The specific latent heat is
the energy required to change 1kg of a particular substance from one state to another, without a change in temperature
The specific latent heat of ____ refers to when a substance changes from a solid to a liquid (or vice versa)
fusion
The specific latent heat of ____ refers to when a substance changes from a liquid to a gas (or vice versa)
vaporisation