1.3 Density and kinetic theory

Density

how closely packed particles are; the amount of mass per unit volume

How the particles in a solid are arranged

tightly packed in a regular structure

How the particles in a liquid are arranged

fairly packed in an irregular structure with some gaps

How the particles in a gas are arranged

Spread out with no structure at all, large gaps due to weak forces

The equation linking density, mass and volume

ρ/d = m/V

ρ

The symbol for density

m

The symbol for mass

V

the symbol for volume

Unit for density

Kilograms per cubic metre (kg/m³)

Unit for volume

Cubic metres (m³)

1 kilogram (kg) is equal to

1000 grams (g)

1 cubic metre (m³) is equal to

1,000,000 cubic centimetres (cm³)

1 gram per cubic centimetre (g/cm³) is equal to

1000 kilograms per cubic metre (kg/m³)

Volume of a regular substance

l x b x h

Volume of an irregular substance

Measure water volume, add substance, new volume is substance volume