p3 - particle model of matter Flashcards
what is density
mass per unit volume of an object
what does density of an object depend on
how close its particles are to each other
what is a physical change
a reversable reaction, if a substance goes back to its original state it will get its original properties back
what is internal energy
total amount of ke and potential energy in a system
what is specific heat capacity
how much energy needed to raise the temp of 1kg of a material by 1oc
what is latent heat
energy needed for a substance to change state of 1kg of the material with no change in temp
what is the specific latent heat of fusion
energy required to change a solid to a liquid
what is the specific latent heat of vaporisation
energy required to change a liquid to a gas
what happens to a gas’ particles when temperature rises
they move faster
if there are more collisions…
pressure is higher
