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27 Cards in this Set
- Front
- Back
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Boiling |
The temperature at which vapor pressure equals standard pressure |
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Crystal |
Rigid body with particles that are arranged in a repeating pattern |
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Dynamic equilibrium |
When two opposing processes occur at the same time and rate so that there is no net change |
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Heat of fusion |
Amount of energy necessary to melt one gram of substance |
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Heat of vaporization |
Amount of energy necessary to boil one gram of substance |
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Equilibrium |
A state in which nothing changes |
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Evaporation |
The Disappearance of liquid as some of its surface molecules become gas molecules |
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Kinetic theory |
energy of motion |
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Melting |
The process by which a solid changes to a liquid |
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Temperature |
A measure of the intensity of heat |
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Sublimation |
When a substance has high enough vapor pressure as a solid so it becomes a gas directly |
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Unit cell |
Simplest repeating unit in a crystal |
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Vapor |
Gas formation of a substance that is usually a liquid |
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Specific heat |
Amount of joules to raise the temperature of 1 gram 1 degree Celsius |
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Pressure |
A measure of the force exerted by the molecules as they collide with the walls of the container |
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Assumption #1 |
All matter is made of small particles |
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Assumption #2 |
These particles are constantly moving |
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Assumption #3 |
Collisions between particles are perfectly elastic |
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4 properties of liquid |
Definite volume Fluidity High density Incompressability |
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4 properties of solids |
Definite shape Definite volume Non fluidity High density |
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3 unit cells |
Simple cubic 8 on each vertex Body centered cubic 8 on vertex 1 in the middle. Face centered cubic 8 on vertex 6 on face. |
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Value for standard pressure |
101.325 |
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Value for standard temperature |
0 degrees Celsius or 273 Kelvin |
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Lechatelier's principle |
If a stress is applied to a system at equilibrium the system will tend to read just to reduce the stress |
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3 vapor pressure rules |
Substances with a lower vapor pressure have strong intermolecular forces. Substances with high vapor pressure have weak intermolecular forces. Ionic compounds do not have vapor pressure because Inter ionic forces are too strong. |
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Internal definition of solids |
Molecules are close to each other and vibrate around a fixed position |
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Internal definition of liquids |
Molecules are close to each other are free to move at a fixed distance with respect to each other |
