Particle model of matter Flashcards
what is density
tell mass for given volume
density equation and unit
densisty (P)= mass(m) / volume (v)
example of density
brick and polystyrene block
what is brick density
brick has high density as lots of mass packed, soild.
what is polystyrene block density
has low density as low mass packed because open strucutre and fuel of air space.
what is soild and diagram
regular pattern and strong force attraction
what happens when soild is heated, and what density
it vibrates as energy is gained. Because it is close to each other there is high density of lots mass in volume.
what is liquid and diagram
it is not fixed arrange shape and weak force attratction, can move around + change shape to fit in container.
what happens when liquid heated and what density.
when heated it gains energy to move making weaker force, gives high density as lots mass in volume.
what is gas and diagram
Gas moves rapdily and far, it has no arrange shape but very weak force attratction.
what density does gas have
low density and small mass of volume
what happens if contained fixed in gas
makes the pressure incrase
what is internal energy
total kinetic and potential energy of all particles in system.
what makes a system
atoms and molcules
what happens during chane of state from internal energy
mass is always conserved and physical change because, material recover its orginal propeorties if change reserved.
what happens when heating soild
increase internal energy, change inot liquid through melting.
what happens when heat liquid internal energy
increase internal energy, change inot gas through boiling and evaportion only surface of lqiuid
why evaportion only surface in liquid when heating liquid to gas
only surface of liquid because have enough energy)
what happens when cool gas down
reduces internal energy, turn back into liquid through condense
what happens when liquid cools down.
reduce internal energy, turn back into soild through freezing.
what is sublimation
soild turn directly to gas.
what is specific heat capacity
amount of energy required to riase the tempertaure of 1kilogram substance by 1 degree celsius
what is specific latent heat
amount of energy required to change the state of 1kilogram substance with no change in tempertaure.
what is specific latent heat of fusion
1kiloram substance from soild to liquid in melting. no change in tempt.
what is specific latent heat of vapporisation
1kilgram substance from liquid to gas in evaportion.
diagram of heating and cooling
check in mindmaps
practicals method of density for regular shape cube
- measure+record, lenthg, width,height- ruler used.
- calculate volume measuring width 3x
- calculate mass on digital balance
- density = mass/volume
gas with high tempertaure =
high kinetic energy and collosion causing higher pressure
gas with low tempertaure=
low kinetic energy and collosion causing lower pressure.
how to tell apart(distinguish) regualr and irregualr shape. (exmaple)
regualr of cube, have dimesions, makes it easy to measure with ruler.
Irregualr of vase, cannot easily measure the dimesions.
pratical how to density of irregualr shape.
COME BACK TO.
does gamma have charge
no
what radiation use as smoke detectors
alpha
how is motion of molecules in gas related to both its tempt and pressure
motion of gas is directly propertional to tempt and pressure
molecules of gas motion have high temt. how related to tempt and pressure
high tempt = high kinetic energy and collision. so frequent motions and collision, causes increase pressure
molecules of gas motion have low temt. how related to tempt and pressure
low tempt = low kinetic energy and collision. so less motions and collision, causes decrease pressure
how increase volume of gas contained constant tempt lead pressure decrease
gas particles have more space, so less collision with container.
