halonax.blogg.se - Kinetic molecular models of liquids and solids

The physical state of a compound is determined by the temperature and the kinetic energy as well as the intermolecular forces in the substance. Ionic compounds never exist as gases since very high temperature is required in overcoming strong electrostatic attraction between the ions. Slowly moving molecules are attracted to each other easily and results in condensed phases: liquid and solids. As the temperature decreased, the molecules of a gas can be condensed to liquids and then to solids. These particles are constantly in motion and possess energy of motion (kinetic energy) that we perceive as temperature. Gases, Liquids, and Solids 7.1 Kinetic Molecular Theory of Matter Kinetic Molecular Theory of Matter The Kinetic Molecular Theory of Matter is a concept that basically states that matter is composed of a very large number of very tiny particles molecules or ions.

Walls of containers of gases are treated as perfectly rigid, do not move, and are infinitely massive (in comparison to the particles).7.

Collisions between the particles, and between the particles and walls of a container for the gas, are perfectly elastic collisions.

Molecules are in constant, random motion.

This again helps support the idea that individual particles don't need to be kept track of, and that the statistical methods of the theory are sufficient to arrive at conclusions and predictions. They are interchangeable in terms of their various properties.

Each molecule is treated as identical to any other molecule.

Instead, statistical methods are applied to analyze the behavior of the system as a whole.

The number of molecules ( N) is very large, to the extent that tracking individual particle behaviors is not possible.Specifically, one implication of this is that their size is extremely small in comparison to the average distance between particles.

Molecules are treated as point particles.