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22 Cards in this Set
- Front
- Back
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ALLOTROPE
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One of two or more different molecular forms of an element in the same physical state; oxygen (O )and ozone (O )are allotropes of the element oxygen
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AMORPHOUS SOLID
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Describes asolid that lacks an ordered internal structure; denotes a random arragement of atoms
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ATMOSPHERIC PRESSURE
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The pressureexerted by atoms and molecules in the atmosphere surrounding Earth, resulting from collisions of these particles with objects
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BAROMETER
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An instrument used to measure atmospheric pressure
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BOILING POINT
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The temperature at which the vapor pressure of a liquid is just equal to the external pressure on the liquid
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CRYSTAL
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A solid in which the atoms, ions, or molecules are arranged in an orderly, repeating, three-dimensional pattern called a crystal lattice
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EVAPORATION
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Vaporization that occurs at the surface of a liquid that is not boiling
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GAS PRESSURE
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Results from the force exerted by a gas per unit surface area of an object; due to collisions of gas particles with the object
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GLASS
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Transparent fusion product of inorganic materials that have cooledto a rigid state without crystalizing.`
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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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A theory explaining the states of matter, based on the concept that all matter consists of tiny particles that are in constant motion
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MELTING POINT
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The temperature at which a substance changes from a solid to a liquid; the melting point of water is O C
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NORMAL BOILING POINT
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The boiling point of a liquid at a pressure of 101.3 kPa or a atm
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PASCAL
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The SI unit of pressure
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PHASE DIAGRAM
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A graph showing the conditions at which a substance exists as a solid, liquid, or vapor
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STANDARD ATMOSPHERE (atm)
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A unit of pressure; it is the pressure required to support 760 mm of mercury in a mercury barometer 25 C
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SUBLIMATION
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The process in which a solid changes to a gas or vapor without passing through the liquid state
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TRIPLE POINT
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The point on a phrase diagram that represents the only set of conditions at which all threephrases existin equilibrium with one another
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UNIT CELL
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The smallest group of particles within a crystal that retians the geometric shape of the crystal
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VACUUM
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A space whereno particles of matter exist
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VAPORIZATION
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The conversion of a liquid to a gas or a vapor
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VAPOR PRESSURE
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A measure of the force exerted by a gas above a liquid in a sealed container; a dynamic equilibrium exists between the vapor and the liquid
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