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Solids, Liquids and Gases

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Pamela Green

on 7 October 2015

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Transcript of Solids, Liquids and Gases

Solids, Liquids
& Gases

States of Matter
Kinetic Theory
Thermal Energy
Motion of Particles
an explanation of how particles in matter behave
total amount of energy in matter
all based on how much Kinetic energy the particles have
All matter is made of atoms
All atoms are in constant motion
Includes kinetic (moving) and potential
As temp lowers, thermal energy goes
down and particles slow down
As temp rises, thermal energy rises and
particles speed up
As you add kinetic energy
the particles move faster and
get further apart
Vocabulary Stuff
- when a solid becomes a gas without passing through the liquid phase
melting point
- temperature at which a solid becomes a liquid
freezing point
- temperature at which a liquid becomes a solid
boiling point
- temperature at which a liquid becomes a gas
condensation point
- temperature at which a gas becomes a liquid
heat of vaporization
- amount of heat energy needed to change a material from a liquid to a gas
heat of fusion
- amount of heat energy needed to change a material from a solid to a liquid
Specific Heat (math stuff)
Q = m c
Q= heat; unit is J for Joules
m = mass; unit is g, kg
c = specific heat; unit is J / g
T = change in temperature; unit is C
How heat flows
heat moves - cold doesn't
conduction - flow of heat between objects that are in direct contact Ex: metal rod in fire

convection - flow of heat caused by the movement of molecules in a liquid or gas
Ex: water boiling on stove

radiation - does not require the movement of particles; travels through empty space
Ex: the sun's energy
Engergy Transformations
Law of Conservation of Energy
Energy cannot be created or destroyed; it is transformed from one form to another.

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