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Unit 5 chem quiz
| Term | Definition |
|---|---|
| Absolute Zero | The lowest possible temperature; the temperature at which all particle movement stops; -273°C or 0 K. |
| Avogadro's Law | Gases at the same temperature, pressure, and volume have the same number of molecules or particles. |
| Boiling Point | The temperature at which a liquid undergoes a phase change from liquid to gas; the temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure. |
| Compound | Pure substance composed of two or more different elements chemically combined. |
| Cooling Curve | Diagram showing phase changed for a substance as it loses energy goes from gas phase all the way to solid phase. |
| Element | Pure substance composed of one species of atoms. |
| Energy | The capacity to do work. |
| Evaporation | Phase change from liquid to gas. |
| Extensive (property) | A physical property that depends on sample size or amount. |
| Heat | Form of energy measured in Joules (J). |
| Heat of Fusion | Energy required to change 1 g of a substance from solid to liquid. |
| Heat of Vaporization | Energy required to change 1 g of a substance from liquid to gas. |
| Heat Transfer | Energy transferred from a substance with more (hotter) to a substance with less (cooler). |
| Heating Curve | Diagram showing phase changes for a substance as it gains energy and goes from solid phase all the way to gas phase. |
| Heterogenous | A sample of matter consisting of more than one pure substance more than one phase. |
| Homogenous | A sample of matter consisting of more than one pure substance with properties that do not vary within the sample |
| Intensive (property) | A physical property that does NOT depend on sample size or amount (Ex: melting point, boiling point, density). |
| Kinetic energy | Energy of motion; energy associated with a change in temperature. |
| Kinetic Molecular Theory (KMT) | A model used to explain the behavior of gases in terms of the motion of their particles. |
| Lattice | The unique crystal structure associated with any given solid. |
| Matter | Anything that has mass and takes up space. |
| Melting Point | The temperature at which a phase change between solid and liquid occurs. |
| Mixture | Two or more pure substance PHYSICALLY combined; a combination of two or more pure substances that can be separated by physical means. |
| 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 liquid is equal to the atmospheric pressure. |
| Potential (AKA Physical) Energy | Energy of position; energy associated with a phase change. |
| Sublimation | Phase change from solid to gas. |
| Vapor Pressure | The upward pressure of a vapor in equilibrium with its liquid. |
| Deposition | Phase change from gas to solid. |
| Mixture | Two or more pure substances physically combined. |
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Sillyflamingo
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