| A | B |
|---|
| phase change | a reversable physical change that occurs when a substance changes form one state of matter to another |
| endothermic | a change in which a system absorbs energy from its surroundings |
| heat of fusion | the energy a substance must absorb in order to change from a solid to a liquid |
| exothermic | a change in which a system releases energy to its surroundings |
| vaporization | the phase change in which a substance changes for a liquid into a gas |
| heat of vaporization | the energy a substance must absorb in order to change from a liquid to a gas |
| evaporation | a process that changes a substance from a liquid to a gas at temperatures below the boiling point |
| vapor pressure | the pressure caused by the collisions of particles in a vapor with the walls of a container |
| condensation | the phase change in which a substance changes from a gas or vapor to a liquid |
| sublimation | the phase change in which a substance changes from a solid to a gas or vapor without changing inot a liquid first |
| deposition | the phase change in which a gas or vapor changes directly into a solid without first changing into a liquid |
| solid | definite shape and definite volume |
| liquid | definite volume but no definite shape |
| gas | neither definite shape nor definite volume |
| kinetic energy | energy an object has due to its motion |
| pressure | the result of a force distributed over an area |
| absolute zero | a temperature of 0 K |
| Charle's Law | volume of a gas is directly proportional to its temperature, P1/T=P2/T2 |
| Boyles Law | volume of a gas is inversely proportional to its pressure, P1*V1=P2*V2 |
| BEC | Bose-Einstein condensate, a state of matter at a temperature of absolute 0, when all partical movement stops |
| boiling | the phase change when a liquid changes to a gas, endothermic |
| Amorphous solid | a non-crystalline solid in which the molecules are not arranged in definite pattern |
| Crystalline solid | a solid where teh molecules are arranged in a definite pattern |
| pascals | the unit of measure for pressure, newtons per square meter |
| melting | the phase change when a solid changes to a liquid, endothermic |
| freezing | the phase change when a liquid changes to a solid, exothermic |
| direct proportion | Charles law |
| indirect proportion | Boyles law |
