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Chemistry: Atoms
ACS Chapter 2
| Question | Answer |
|---|---|
| Energy | moving atoms and molecules have: |
| Kinetic Energy | anything that has mass and is moving has |
| As the speed increases: | energy increases |
| As the speed decreases: | energy decreases |
| Conduction | process of transferring energy by direct contact |
| Warming | increasing energy |
| Cooling | decreasing energy |
| Rule of Conduction | Energy can only be transferred from sonething at a higher temperature to somehing at lower temperature. |
| Objects can be cooled by allowing | energy to be transferred to something colder |
| Temperature | measure of the average kinetic energy of the atoms or molecules of a substance |
| Heat | the energy that is transferred from a substance at a higher temperure to a substance at a lower temperature. |
| Melting | Changing from a solid to a liquid |
| Melting | the motion of the particles increase in a solid |
| Melting point | the exact temperature at which on object begins to change from a solid to a liquid. |
| Sublimation | changing from a solid to a gas, skipping the liquid stage |
| Evaporation | changing from a liquid to a gas |
| Increase in temperature | Increases evaporation rate (rate of vaporization) |
| Condensation | changing from a gas to a liquid |
| Condensation | slowing of particles from a gas to a liquid. |
| Cooling | increases the rate of condensation |
| Freezing | slowing down of molecules so that their attraction overcomes their motion. |
| Deposition | changing from a gas to a solid skipping the liquid stage |