| A | B |
|---|
| 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, & volume have the same number of molecules or particles |
| (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 |
| Compound | pure substance composed of two or more different elements chemically combined |
| Cooling Curve | diagram showing phase changes for a substance as it loses energy and goes from gas phase all the way to solid phase |
| Deposition | phase change from gas to solid |
| Energy | the capacity to do work |
| Element | pure substance composed of one species of atoms |
| Evaporation | phase change from liquid to gas |
| Extensive (property) | a physical property that depends on sample size or amount (Ex: mass, length). |
| 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 |
| Heating Curve | diagram showing phase changes for a substance as it gains energy and goes from solid phase all the way to gas phase. |
| Heat Transfer | energy transferred from a substance with more (hotter) to a substance with less (cooler). |
| 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 substances physically combined |
| Potential (AKA Physical) Energy | energy of position; energy associated with a phase change. |
| Sublimation | phase change from solid to gas |
| Temperature | a measure of average kinetic energy |
| Vapor Pressure | the upward pressure of a vapor in equilibrium with its liquid |
