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phases of matter

basic vocabulary

solid matter that has a definite shape and a definite volume. definite crystalline arrangement.
vapor a gaseous state of a substance that is normally a liquid at room temperature
vaporization at constant temperature, it is a process in which particles in the liquid phase gain enough energy to break away into the gaseous phase. also known as boiling reverse of condensation
sublimation the process in which a solid changes directly into a gas; a phase skipper reverse of deposition
liquid a phase of matter having a definite volume but not definate shape...takes the shape of its container ( a shape shifter)
HEAT OF FUSION amount of heat needed to convert a unit mass of a substance from a solid to its liquid at its melting point.
exothermic a chemical reaction that releases heat, producing products with less potential energy then the reatants
freezing point the constant temperature process in which both the solid and liquid phase existt in equilibrium, the same temperature as the substance's melting point
endothermic a chemical reaction that absorbs heat, producing products with more potential energy then the reactants
deposition the process in which a gas changes directly into a solid. the reverse of sublimation
condensation an exothermic process which a vapor or gas changes into the liquid phase, the potential energy of a substance decreases during this constant temperature process the reverse of vaporization
boiling point the temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure
specific heat capacity the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).
gas an airl ike fluid substance which expands freely to fill any space available, irrespective of its quantity.
Force of attraction a force that draws an object close due to its attraction. same as inter-molecular force (IMF)
Kinetic energy energy that a body possesses by virtue of being in motion.
Potential energy the energy possessed by a body by virtue of its position relative to others, energy at rest
solid regular repeating geometric pattern
IMF inter molecular forces
force attraction between molecules
bond is between atoms
calorimetry the science of measuring the change in heat that comes from a chemical reaction
enthalpy a thermodynamic quantity equivalent to the total heat content of a system
Created by: annpaige



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