P3 Revision Flashcards
What is density
The amount of mass per unit volume
Describe particles in a solid
particles are tightly packed in a regular structure - vibrate around fixed positions
Describe particles in a liquid
particles are tightly packed but free to move past each other
Describe particles in a gas
particles are spread out and move randomly
Equation for density
Density(kg/m^3) = mass(kg) / volume (m^3)
How do you measure the volume of an irregular shape
Using a displacement can
How to use a displacement can
The displacement can is filled with water above a narrow spout and allowed to drain until the water is level with the bottom of the spout.
As the irregular object is lowered into the displacement can, the water level rises. All the displaced water comes out of the spout and is collected in a measuring cylinder.
The displaced water in the cylinder occupies the same amount of space as the object in the can, which means that their volumes are the same.
Solid - liquid
Liquid - gas
Melting
Boiling
Gas - liquid
Liquid- solid
Condensing
Freezing
Solid - gas
Gas - solid
Sublimation
Deposition
What is specific heat capacity
The amount of energy needed to raise the temperature of 1kg of a substance by 1 degree Celsius
Equation for specific heat capacity
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