Particle Models Of Mater Flashcards
How to measure volume of a regular shaped object
Measure mass with balance
Measure length width and height
Calculate volume
Use density equation
How to measure density of irregular object
Measure mass using balance
Fill eureka can
Place object in water- water displaced by shape will fill measuring cylinder
Measure volume of water
Use density equation
How to work out density
Mass divide volume
How are solids arranged
Strong forces of attraction
Held in closely fixed regular arrangement
Do not have much energy can only vibrate
How are liquids arranged
Weaker forces of attractions
Close together but move past each other
Form irregular arrangements
More energy than solid
How are gasses arranged
No forces of attraction
Most energy and free to movie in random directions
What will happen if temperature of gas increases
Pressure will increase
Hotter the temp the more kinetic energy the gas particles have
Move faster collide with sides of container more
What happens with particles internal energy
Within a system they have kinetic energy and vibrate and move around
Have potential energy stores
Total internal energy is kinetic and potential energy stores
What happens when something gains energy (solid liquid gas)
If system gains energy it can change temp / state
If heated enough it can break bonds
No chemical change only physical
No new substance formed
Mass conversed
What happens during melting and boiling
Energy is being put in increasing internal energy
Energy is used to break bonds so temp does not increase
What happens when a substance is condensing or freezing
Energy put in is used to form bonds releasing energy
Internal energy decreases but temp does not go down
What is specific latent heat
Amount of energy needed to change 1 kg of substance from one state to another by 1 degrees
How to get from solid to liquid
Specific latent heat of fusion
How to get from liquid to gas
Specific latent heat of vaporisation
How to work out specific latent heat
Energy divide mass
