Combined Physics - P3 Particle Model of Matter Flashcards
What equation links density, mass and volume?
Density = mass / volume
What two energy stores make up the internal energy stored by particles?
Kinetic energy and potential energy stores.
Draw a particle model for a liquid.
Name the change of state when a solid turns straight into a gas.
Sublimation
Draw a particle model for a solid.
Draw a particle model for a gas.
Name the change of state labelled ‘a’ in the diagram.
Melting
What is specific heat capacity?
The amount of energy required to raise the temperature of 1 kg of the substance by 1 oC.
What is the name for the energy stored by particles?
Internal energy
What are the units for:
a) Mass
b) Volume
c) Density
a) The units for mass are kg
b) The units for volume are m3
c) The units for density are kg/m3
How would you measure the density of a regular object?
- Measure the volume of the object (e.g. for a square, you would measure the length of the sides using a ruler and multiply length x width x height)
- Measure its mass using a balance.
- Calculate density using the equation: density = mass / volume
What do the horizontal lines on a heating or cooling curve represent?
A change of state
How would you measure the density of an irregular object?
- Measure the mass using a balance.
- Measure volume by placing the object in a eureka can filled with water.
- Measure the volume of water displaced into a measuring cylinder to find the volume of the object.
- Calculate density using the equation: density = mass / volume
Name the change of state labelled ‘b’ in the diagram.
Freezing
Name the change of state labelled ‘c’ in the diagram.
Boiling
Name the change of state labelled ‘d’ in the diagram.
Condensing
