Topic 3 - Particle model of matter Flashcards
What is the particle theory
the particle theory is that everything, little or small, is made up of particles
What is the structure of a solid
strong forces of attraction, fixed and regular arrangement. Not enough room to move so only can vibrate
what is the structure of a Liquid
Weaker forces of attraction, irregular arrangement so can move past each other.
What is the structure of a gas
There are almost no forces of attraction in a gas. have more energy than liquid or solid and are free to move
what is density
it is how many particles are in a given space
equation to work out density
Density = Mass/ Volume
How is density measure
it is measure by the compactness of a substance
What is internal energy
it is the energy stored by particles that make up the system
What type of energy stores are in internal energy
the system vibrates or moves around so it has kinetic energy store and has energy in its potential energy stores due to its position
what would happen if you were to heat up a system
when the system is heated up the system transfers energy to its particles (increasing its kinetic energy) making it move faster, increasing the internal energy
What would happen if you give enough heat t a substance (bonds)
A change of state occurs. they will have enough energy stores in their kinetic energy stores to break the bonds.
