Particle Model Of Matter Flashcards
(31 cards)
Three states of matter
Solids, liquids, gas
Which states are incompressible
Solid and liquid
Solid particles
Fixed pattern, fixed size and shape
Liquid particles
Fixed size, particles are free to move, can change shape to fit in the container
Gas particles
Large gaps between,compressible, can change size and shape
Density of a material is:
It’s mass per unit volume
Formula for density
Density= mass/volume
Density is measured in
Kg/m^3
Required practical
Text book pg84
Internal energy is
Total kinetic energy and potential energy of all the particles in the system and are stored by particles
As energy is added to a system…
It’s temperature will increase
At the melting or boiling point
Energy being added causes the substance to change state not temperature
Change of state is
Reversible
It is a physical change that
Alters the internal energy but not the temperature or mass
EnEnergy for a change of state=
Mass X specific latent heat
Latent heat of fusion is
The energy needed for a substance to change from solid to liquid
The latent heat of vaporisation is
The energy needed for substance to change from liquid to gas
The horizontal parts of heating and cooling graphs indicate
Where energy is being used change state
The particles Gas are in
Constant random motion
Temperature of the gas is related to
The average kinetic energy of the particles
When the particles of a gas collide The wall
They exert a force on the wall which is felt as pressure
If the volume is kept constant increasing the temperature increases
The speed of the particlesThis increases the frequency and force which The particles hit the walls and increase the pressure
Changing the volume of a gas can also
Change the pressure
The temperature is kept constant increasing the size of the container well
Reduce the pressure of the particles to collide with the walls less frequently
