Particle Model of Matter Flashcards
Why are solids and liquids incompressible
-difference between them
there are no gaps between the particles in them
liquids contain particles that are free to move allowing them to change shape and fit into their container
What is internal energy
the total kinetic energy and potential energy of all the particles in a system and is stored by the particles
What causes a substance to change state at the melting and boiling point
what is a change of state
the energy being added not the temperature
a change of state alters the internal energy but not the temperature or mass - not a chemical change
what is the latent heat of fusion
the energy needed for a substance to change from a solid to a liquid (melt)
what is latent heat of vaporisation
the energy needed for a substance to change from a liquid to a gas (evaporate)
what does the horizontal part on a heating / cooling graph indicate
where energy is being used to change state
