| A | B |
| Evaporation | Is a type of vaporization of a liquid that occurs only on the surface of a liquid.,  |
| Effusion | The movement of a gas through a pore or capillary into another gaseous region or into a vacuum,  |
| Real Gas | A gas that does not behave as an ideal gas.,  |
| Elastic Collision | An elastic collision is a collision in which the total kinetic energy of the colliding bodies after collision is equal to their total kinetic energy before collision. Elastic collisions occur only if there is no net conversion of kinetic energy into other forms,  |
| Diffusion | The process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration,  |
| Freezing Point | The temperature at which a liquid freezes: The freezing point of water is 32°F, 0°C.,  |
| Molar Enthalpy of Fusion | Also known as the heat of fusion or specific melting heat, is the change in enthalpy resulting from the addition or removal of heat from 1 mole of a substance to change its state from a solid to a liquid (melting) or the reverse processes of freezing.,  |
| Sublimation | To divert the energy of (a sexual or other biological impulse) from its immediate goal to one of a more acceptable social, moral, or aesthetic nature or use.,  |
| Deposition | The state of being deposited or precipitated,  |
| Crystal Structure | Is a unique arrangement of atoms or molecules in a crystalline liquid or solid.,  |
| Unit Cell | The smallest group of atoms or molecules whose repetition at regular intervals in three dimensions produces the lattices of a crystal.,  |
| Phase Diagram | A graph, with axes representing temperature and pressure, showing the equilibrium conditions for a given substance to be a solid, liquid or gas.,  |
| Triple Point | Is the temperature and pressure at which three phases (for example, gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.,  |
| Melting Point | The temperature at which a solid and liquid phase may coexist in equilibrium. The term applies to pure liquids and solutions.,  |
| Super Cooled Liquids | A liquid that has been cooled to a temperature below its freezing point.,  |
| Freezing | The process in which a liquid turns into a solid when cold enough,  |