P6 - matter Flashcards
What is density
The amount of mass in a given volume
Word equation for density
Density = mass / volume
Symbol equation for density
Rho = m/v
What is the difference between evaporating and boiling
Evaporating happens at any temperature on the surface of the liquid, particles on the surface find it easier to break away
Boiling happens at the boiling point and is faster
What is internal energy
The total energy of the substance - the kinetic energy (temperature) of a substance plus the potential energy (distance between particles, state)
What happens to kinetic energy when potential energy increases
Decreases
Formula for internal energy
Internal energy = kinetic energy + potential energy
What is latent heat
How much energy is needed to get 1kg of a substance to change state
Why does temperature stay the same when changing state
The energy is being used to break or make the bonds
Word equation for specific latent heat
Energy put in = specific latent heat x mass
Symbol equation for specific latent heat
E = mL
What is atmospheric pressure in kPa
100 kPa
What is pressure vs absolute pressure
Pressure is relative to atmospheric pressure (Pa)
Absolute pressure is pressure + 100kPa
What is absolute zero
No energy, -273 degrees C
What is the relationship between pressure and volume
When volume is decreased, pressure increases, inversely proportional
