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# Chap 9 study stack

### chap 9

TermDefinition
heat flows from hot to cold
kinetic molecular model molecules are in constant motion
PE+KE= total internal energy
Thermal energy the sum of all the kinetic energy of an object
Thermal energy can only be measured as it is transfered from one system to another
When molecules start moving they are gaining thermal energy
thermal energy is not temperature
temperature is an objects average kinetic energy
transfering kinetic energy is heating or cooling
fiducial points freezing or boiling point of pure water
Celsius= 5/9(Fahrenheit-32)
Fahrenheit= 9/5*Celsius+32
Thermal expansion particles gaining enough energy to literally increase the mass of the object
Elictrical resistance how to measure how well electricity is conducted
Viscosity the measure of liquids resistance to flow
Heat is the quantity of thermal energy that flows from one place to another
Conduction thermal energy transfers through solids
Convection thermal energy transfers through fluids
Radiation Thermal energy that can travel through a vacuum does not require contact with object radiating thermal energy
Insulator stops/absorbs thermal energy
Heat capacity How much energy absorbed compared to change in temperature C=Q/(delta)T
Specific heat or specific heat capacity (same thing) Q=MC(delta)T
Latent heat heat used by the substance to change its state not temperature
Triple point point at which solid liquid and gas can exist at the same time together
critical point the temperature at which more pressure will not make a gas back into a liquid its a gas until it cools
Freezing point Temperature where substances freeze
Boiling point Temperature at which substances change from a liquid to a gas
Created by: cherylb923