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22 Cards in this Set
- Front
- Back
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Kinetic Energy
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The energy an object has because of its motion.
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Kinetic Theory
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States that the tiny particles in all forms of matter are in constant motion.
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Gas Pressure
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defined as the force exerted by a gas per unit surface area of an object.
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Vacuum
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An empty space with no particles and no pressure.
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Atmospheric Pressure
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The collisions of air molecules with objects.
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Barometers
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Are devices commonly used to measure atmospheric pressure.
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Pascal
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The SI Unit of pressure.
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Standard Atmosphere
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Is the pressure required to support 760 mm of mercury in a mercury barometer at 25 C.
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Vaporization
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Conversion of a liquid to a gas or a vapor.
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Evaporation
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When a conversion occurs at the surface of a liquid that is not boiling.
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Vapor Pressure
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Force due to the gas above the liquid.
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Boiling Point
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Is the temperature at which the vapor pressure of the liquid is just equal to the external pressure.
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Normal Boiling Point
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Is defined as the boiling point of a liquid at the pressure of 101.3 kpa.
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Melting Point
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Is the temperature at which a solid turns into a liquid.
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Crystal
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Are atoms, ions or molecules that make up the solid substances are arranged ina orderly, repeating, three-dimensional pattern.
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Unit Cell
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The smallest group of particles within a crystal that retains the geometric shape of the crystal.
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Allostropes
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Are two or more different molecular forms of the element in the same physical state.
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Amorphous Solid
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Lacks an ordered internal structure.
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Glasses
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Transparent fusion products of inorganic substances that have cooled to a rigid state without crystallyzing.
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Phase Diagram
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Gives the conditions of temperature and pressure at which a substance exsists as a solid, liquid and gas.
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Triple Point
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This meeting point describes the only set of conidtions at which all three phases can exsist in equilibrium with one another.
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Sublimation
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The change of a substance from a solid to a vapor without passing through the liquid state.
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