Unit 7 Flashcards
(31 cards)
Kinetic theory
an explanation of how the particles in gases behave
solid
the state of matter that has a definite shape and volume
crystalline solids
have a very orderly, three-dimensional arrangement of particles
amorphous solids
made of particles that do not have a special arrangement.
Liquid
the state of matter that has a definitive volume but takes the shape of its container
gas
the state of matter that has no definite shape or volume
change of state
the change of a substance from one physical form to another
melting
solid to liquid
Melting point
the temperature at which a solid changes into a liquid
heat of fusion (Hfus)
the energy required to change a substance from a solid to a liquid
heat of fusion equation
energy = mass x Hfus
endothermic change
adding energy
exothermic change
removing energy
Freezing
liquid to solid
boiling
liquid to gas
evaporation
Liquid to gas
Heat of vaporization (Hvap)
the amount of energy required to change a liquid to a gas
Hvap equation
energy = mass x Hvap
Condensation
gas to liquid
sublimation
solid directly to gas
deposition
gas directly to solid
why are graphs flat and slanted and not curved?
Because only temperature or state can change at a time
plasma
matter that has enough energy to overcome the attractive forces between its particles and the attractive forces within its atoms
thermal expansion
an increase in size when increased temperature
