The state of matter depends on two competing factors:
The balance between these two factors determines whether matter exists as a solid, liquid, gas, or plasma.
Definition: A state of matter with a definite shape and definite volume.
Examples: Iron, ice, diamond, sodium chloride, wood
| Type | Description | Examples |
|---|---|---|
| Crystalline | Highly ordered, repeating 3D lattice structure | NaCl, diamond, quartz |
| Amorphous | Disordered arrangement, no long-range order | Glass, rubber, plastic |
Definition: A state of matter with a definite volume but no definite shape — liquids take the shape of their container.
Examples: Water, mercury, ethanol, oil
Definition: A state of matter with no definite shape and no definite volume — gases expand to fill the entire container.
Examples: Oxygen, nitrogen, carbon dioxide, helium, water vapor
| Property | Solid | Liquid | Gas |
|---|---|---|---|
| Shape | Definite | Takes container shape | Fills entire container |
| Volume | Definite | Definite | No definite volume |
| Compressibility | Very low | Very low | Very high |
| Density | High | Moderate to high | Very low |
| Intermolecular forces | Very strong | Strong | Negligible |
| Particle arrangement | Fixed, ordered | Close, disordered | Far apart, random |
| Particle motion | Vibration only | Slide past each other | Free, rapid, random |
| Kinetic energy | Lowest | Intermediate | Highest |
| Diffusion | Very slow | Slow | Very fast |
| Fluidity | No | Yes | Yes |
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States of Matter: Solid, Liquid & Gas — Properties & Comparison Notes is a fundamental concept in physical chemistry. Understanding the mechanisms, reaction conditions, and stereo-chemical outcomes is crucial for mastering organic chemistry. Our curated resources provide step-by-step visualizations to help you excel.
SELF TEST
Which state of matter has a definite volume but no definite shape?
LEARNING SUPPORT
Gas particles are in constant, rapid, and random motion. As they move, they continuously collide with the walls of their container. The collective force of these collisions over a given area creates gas pressure.
Crystalline solids have a highly ordered, repeating, 3D arrangement of particles (a crystal lattice), giving them sharp melting points. Amorphous solids lack this long-range order and have randomly arranged particles, causing them to soften over a range of temperatures.
Increasing temperature increases the kinetic energy of the molecules. When the kinetic energy becomes high enough to overcome the intermolecular forces holding the molecules together in the liquid state, the liquid vaporizes into a gas.