States of aggregation of matter: solids, liquids and gases - Science Magic: Blog for scientists, researchers and students.

It is essential to keep these important definitions in mind. The subject is presented to us in many phases or states, all with different properties and characteristics, and although the most known and observable daily are four: states are observable under extreme conditions of pressure and temperature.

In physics and chemistry it can be seen that for any body or material state, by modifying the temperature and / or pressure conditions, different states or phases of aggregation can be obtained, called states of aggregation of matter, related to the forces (molecules, atoms or ions) that make up matter.

At low temperatures, materials are presented as bodies in a compact and precise way; and their atoms are often intertwined forming crystalline structures, which gives them the ability to withstand forces without apparent deformation. Solids are generally characterized as hard and hard, and in them the forces of attraction are greater than those of repulsion. The presence of small intermolecular spaces characterizes the solids giving rise to the intervention of the bonding forces that locate the cells in a geometric form.

Solid state substances have the following characteristics:

Defined shape < of inconstancy

Incompressibility (can not be compressed)
Resistance to fragmentation
Very low or no fluency
Some of them are sublimate (iodine)
Tense Volume

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Increasing the temperature further reaches the gaseous state. The atoms or molecules of the gas are practically free, so that they are able to be distributed throughout the space in which they are contained.

The gaseous state has the following characteristics:

Cohesion almost null. Without a definite form

Its volume only exists in containers that contain it.
They can be easily compressed
Press the walls of the container

The molecules that compose it move freely. br> Exert ultra dynamic movement.

Download the complete presentation on gases, pdf format:

*Text taken from Wikipedia

States of aggregation of matter: solids, liquids and gases Reviewed by Science Magic on Thursday, November 26, 2009 Rating: 5

  • Adam Floyd