Particle Model Of Matter Flashcards
(15 cards)
What is the formula for density?
π = π / π
Why do gases have lower densities than solids or liquids?
Their particles are far apart, occupying a larger volume.
Is mass conserved during a change of state?
Yes, mass is conserved.
Are changes of state physical or chemical changes?
Physical changes.
What are the two forms of internal energy?
Kinetic energy and potential energy between particles.
What happens to internal energy when you heat a system?
It increases, either raising temperature or changing state.
What is specific heat capacity?
Energy required to raise the temperature of 1 kg of a substance by 1Β°C.
What is the equation for change in thermal energy?
ΞπΈ = ππΞπ
What is specific latent heat?
Energy needed to change the state of 1kg of a substance without temperature change.
What is the formula for energy during a change of state?
πΈ = ππΏ
How is gas pressure created?
Particles colliding with container walls exert a force.
What happens to pressure when temperature increases?
Pressure increases (if volume is constant).
What happens to pressure if volume increases?
Pressure decreases (Boyleβs Law).
What happens to temperature when a gas is compressed?
It increases.
Why does pressure increase when volume is reduced?
More frequent collisions of particles with the walls.
