P6: Density Flashcards
what is the density of a substance
its mass per unit volume
how to measure the density of a solid object
measure it using an electrical balance. make sure it says 0
measure the dimensions and measure volume
density= mass/volume
changes of state are examples of what
physical changes, no new substances are produced
what is specific latent heat
the amount of energy to make 1kg of a substance change state
what is internal energy
the energy stored by the particles of substance, caused by motion and position
what is internal energy a sum of
-kinetic energy
-potential energy
what is the specific latent heat of fusion
the energy needed to change the state of 1kg of the substance from solid to liquid at its melting point
what is the specific latent heat of vaporisation
the energy needed to change the state 1kg of the substance from liquid to vapour, at its boiling point.
what are the two things we can do to increase pressure
-increasing temperature
-decreasing volume
what is Boyle’s Law
pressure x volume = constant
