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26 Cards in this Set
- Front
- Back
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Absolute zero |
the lowest possible temperature; the temperature at which all particle movement stops; -273˚C or 0 K. |
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Avogrado law |
gases at the same temperature, pressure, & volume have the same number of molecules or particles. |
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(Normal) boiling point |
the temperature at which a phase change between liquid and gas occurs at 1 atm or 101.3 kPa; the temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure. |
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Compund |
pure substance composed of two or more different elements chemically combined. |
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Cooling curve |
diagram showing phase changes for a substance as it loses energy and goes from gas phase all the way to solid phase. |
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Deposition |
phase change from gas to solid. |
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Energy |
the capacity to do work. |
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Element |
pure substance composed of one species of atoms. |
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Evaporation |
phase change from liquid to gas. |
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Extensive (property) |
a physical property that depends on sample size or amount (Ex: mass, length). |
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Heat |
form of energy measured in Joules (J). |
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Heat of fusion |
energy required to change 1 g of a substance from solid to liquid. |
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Heat of vaporation |
energy required to change 1 g of a substance from liquid to gas. |
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Heating curve |
diagram showing phase changes for a substance as it gains energy and goes from solid phase all the way to gas phase. |
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Heat transfer |
energy transferred from a substance with more (hotter) to a substance with less (cooler). |
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Intensive (property) |
a physical property that does NOT depend on sample size or amount (Ex: melting point, boiling point, density) |
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Kenitic energy |
energy of motion; energy associated with a change in temperature. |
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Kinetic molecular theory (KMT) |
a model used to explain the behavior of gases in terms of the motion of their particles. |
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Lattice |
the unique crystal structure associated with any given solid. |
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Matter |
anything that has mass and takes up space. |
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Melting point |
the temperature at which a phase change between solid and liquid occurs. |
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Mixture |
two or more pure substances physically combined. |
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Potential energy |
energy of position; energy associated with a phase change. |
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Sublimation |
phase change from solid to gas. |
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Tempature |
a measure of average kinetic energy. |
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Vapor preasure |
the upward pressure of a vapor in equilibrium with its liquid. |
