3-Particle Model Of Matter Flashcards
What is the equation for density
Density (kg/m3) = mass(kg) / volume (m3)
p=m/v
What is the arrangement of particles in solids
Fixed, regular formation, high density.
Strong forces hold them together
Characteristics of solids in terms of energy and movement
Particles don’t have much energy so they only vibrate in fixed positions
How are the particles arranged in liquids
Close together but can move past each other and form irregular arrangements
Generally less dense than solids.
Weaker forces of attraction between particles
Characteristics of liquids in terms of energy and movement
More energy than solids,
Move in random directions at low speeds
How r the particles arranged on gases
Particles r far apart and have almost no forces of attraction between them.
Low density
Characteristics of gases in terms of energy and movement
More energy than liquids and solids,
Move at high speeds in random directions
For measuring the volume of an irregular solid, what is the object placed into
Submerged in a eureka can filled with water
What does heating a system do to the particles
Transfers energy to the particles, increasing the internal energy
When does a change in state occur
When the substance is heated enough and the particles have enough energy to break their bonds. Or if it gets cool enough to lose energy and form bonds
What is the energy needed to change a state of a substance called
Latent heat
What is specific latent heat of a substance
The amount of energy needed to change 1kg of the substance from one state to another without changing its temperature
What is the equation for energy linking to specific latent heat
Energy (J) = Mass (kg) x Specific latent heat (J/kg)
E=mL
What happens when gas particles collide
They exert a force (pressure) on it
What is the outward gas pressure in a sealed container
The total force exerted by all of the particles in the gas on a unit area of the container walls
What does increasing temperature do to gas particles
Increases the speed of particles so there r more frequent collisions- increased pressure
What is the relationship between pressure and volume for gas of fixed mass and constant temperature
Pressure(Pa) x Volume(m*3) = constant
pV = constant
Why would a helium balloon expand as it rises
The atmospheric pressure decreases with height so the ballon has more pressure so it expands until the pressure inside drops to the same as the atmospheric pressure
How does using a bike pump increase the gas’s temperature
Work has to be done to push down the plunger in the pump, this transfers energy to the kinetic energy stores which increases the temperature
