Particles Model Of Matter Flashcards
What is the equation linking density, mass and volume?
P= MV
Describe solid states of matter, structure, shape, and movement of particles
Solids have a definite shape and volume
Describe liquid states of matter in terms of structure, shape, and movement
Definite volume, take shape of the container
Describe gas, three states of matter, structure, shape, and movement of particles
No definite shape or volume
Why is a change of state referred to as physical change I’m not chemical change
No new substances are made, and the change often easily reversed
Describe the displacement technique used to determine the volume of an irregular shaped object
Object is dumped into unknown volume of water. Water level will increase.
When is substances change state their mass is conserved. What does this mean?
Mass of a substance doesn’t change
Describe how to determine the volume of a regular shaped object
Volume = length X breadth X height
Is internal energy
Total amount of energy in a system due to random motion of particles
Explain the differences in density of solids, liquids and gases
Solid to have high density. Liquid particles can move around more freely so slide over each other lower density gas particles far apart move quick.
Define specific heat capacity
Amount of heat energy required to raise temperature of unit mass by one degrees Celsius
What is the equation linking change in thermal energy, mass specific, heat, capacity and temperature?
Change in thermal energy = mass X specific heat capacity X changing temp
After a long journey, the temperature of a car tyre increases. What is the effect on the gas particles within the tire?
Average kinetic energy of gas particles increase, Move collide particles on wall, greater force and speed
Latent heat
Energy, absorbed, or released by a substance, when it changes state without changing temp
What is the equation linking energy for a change of state, maths and specific latent heat?
Q = MLL
Describe the difference between specific latent heat of fusion and specific latent heat of vaporisation
Specific latent heat, solid to liquid liquid to solid, vaporisation, gas to liquid liquid to gas
Distinguish between specific heat, capacity and specific latent heat
Specific heat the time and energy needed to change temperature specific latent energy needed to change state
Explain the effect of an increase in temperature on the pressure of gas in container
Particles collide, increasing pressure and kinetic energy
