topic 3

Cards (14)

what are the units of pressure
pascles/Pa
what do the molecules of gas do
they move with constant random motion
what are the units of specific latent heat
j/kg
what is the specific latent heat of a substance
the amount of energy needed to change the state of 1kg of a substance with no change in temperature
what is latent heat
the energy needed for a substance to change states
how does heating an object change the internal energy
it increases the energy of the particles that make up the system
what is internal energy
total kinetic and potential energy stored inside a system
what makes a change of state different to a chemical reaction
they are physical changes, so it can be reversed
describe how to find the density of a regular solid
find the volume (bxhxw)
find the mass
divide mass by volume
when is mass conserved
changes of state
what is the particle model useful for
to explain the states of matter and the differences in density
what are the common units of density 
kg/m cubed
g/cm cubed
what is the word equation for density
density = mass/ volume
what is the definition of density
the amount of matter in a given volume