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3.MA1Thermodynamics

phase change and heat transfer

TermDefinition
evaporation process of going from a liquid to a gas
condensation process of going from a gas to a liquid
sublimation phase change from a solid directly to a gas
absolute zero coldest possible temperature at which all Brownian motion stops; 0 Kelvin.
temperature average kinetic energy of an atom
heat movement of thermal energy between objects that are different temperatures
thermal energy TOTAL KE of all the atoms in a sample of a substance
joule SI Unit for heat (and energy)
specific heat amount of energy needed to increase the temperature of a gram of something 1 degree Celsius
conduction heat transfer through direct contact or touching (EX- touching an iron)
convection heat transfer through currents (density); occurs in liquids or gases (EX- heating a room)
radiation heat transfer through empty space that is then absorbed by a substance or object (EX- fire)
melting point temperature at which a solid turns into a liquid.
Created by: jparsons