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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 |