Particle model of matter Flashcards
(15 cards)
Describe solids
packed in regular structure
Strong forces hold in place so cannot move
Vibrating in fixed positions
Difficult to change shape
Describe liquids
Close together
Weaker forces maintain contact
Abel to pass each other
Can change shape but virtually incompressible
Describe gases
Separated by large distances
Weak forces
Constantly randomly moving
Can expand to fill a space, easy to compress
all 5 state changes
melting
boiling
Freezing
Condesing
Sublimation
what is sublimation and deposition
sublimation - turning straight from a solid into a gas
deposition - turning straight from a gas into a solid
no change in mass
Density
A measure of how much mass is contains in a volume of a substance
What is internal energy
Energy stored in a system by the particles
Total kinetic energy + total potential energy
What happens during a state change
Potential energy of particles is increased
What is specific latent heat? What are the different types?
How much energy is needed to change the state of 1kg of a substance.
Fusion and Vaporisation
Particles in a gas are in _____.
Constant random motion
Temperature is a measure of the ________.
average kinetic energy of the substance
In a hotter gas, the particles ________.
Are moving faster
Temperature is _____, yet pressure and volume of a gas is ______.
constant, inversely proportional
smaller volume means ______.
higher temperature
If you increase the kinetic energy of the gas particles, you _________.
increase the temperature of the gas.
