| A | B |
|---|
| Absolute Zero | the lowest possible temperature at which all particle movement stops; 0K |
| Avogadro's Law | gases at the same temperature, pressure & volume have the same number of molecules or particles |
| (normal) Boiling Point | Temperature at which a phase change between liquid and gas occurs at 1 atm or 101.3 kPa; temp. at which 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 phse |
| Deposition | Gas to solid phase change |
| Energy | The capacity to do work |
| Element | Pure substances composed of one species of atoms |
| Evaporation | Liquid to gas phase change at surface |
| Extensive (property) | A physical property that depends on sample size or amount (mass, length, energy) |
| 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 stubstance from liquid to gas |
| Heating Curve | Diagram showing phase changes for a substance as it gains energy and goes from solid all the way to gas |
| Heat Transfer | Energy transferred from a substances with more (hotter) to a substance with less (cooler). |
| Intensive Property | A physical property that does NOT depend on sample size or amount (melting point, density, temperature) |
| 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 |
| Melting Point | Temperature at which a phase change between solid and liquid occurs |
| Potential Energy | Energy of position; energy associated with a phase change |
| Sublimation | Solid to Gas Phase change |
| Temperature | a measure of average kinetic energy |
| Vapor Pressure | the upward pressure of a vapor in equilibrium with its liquid |
