Kinetic Theory

The kinetic theory of gases describes a gas as a large number of small particles (atoms or molecules), all of which are in constant, random motion. The rapidly moving particles constantly collide with each other and with the walls of the container. Kinetic theory explains macroscopic properties of gases, such as pressure, temperature, and volume, by considering their molecular composition and motion. Essentially, the theory posits that pressure is due not to static repulsion between molecules, as was Isaac Newton's conjecture, but due to collisions between molecules moving at different velocities through Brownian motion.

While the particles making up a gas are too small to be visible, the jittering motion of pollen grains or dust particles which can be seen under a microscope, known as Brownian motion, results directly from collisions between the particle and gas molecules. As pointed out by Albert Einstein in 1905, this experimental evidence for kinetic theory is generally seen as having confirmed the existence of atoms and molecules.

Read more about Kinetic TheoryPostulates, History

Other articles related to "kinetic theory, theory, kinetics, kinetic":

List Of Textbooks In Statistical Mechanics - Kinetic Theory
... Lectures on gas theory ... Physical kinetics ... of Nonequilibrium Processes Basic Concepts, Kinetic Theory ...
Kinetic Theory - History
... In 1738 Daniel Bernoulli published Hydrodynamica, which laid the basis for the kinetic theory of gases ... that what we experience as heat is simply the kinetic energy of their motion ... The theory was not immediately accepted, in part because conservation of energy had not yet been established, and it was not obvious to physicists ...
Annus Mirabilis Papers - Papers - Brownian Motion
... a Stationary Liquid, as Required by the Molecular Kinetic Theory of Heat"), received May 11 and published July 18, delineated a stochastic model of Brownian motion ... In this paper it will be shown that, according to the molecular kinetic theory of heat, bodies of a microscopically visible size suspended in liquids must, as a result of thermal molecular ... Using the kinetic theory of fluids, which at the time was controversial, the article established the phenomenon, which was lacking a satisfactory explanation even decades after the first observation ...
Gas - Microscopic - Kinetic Theory
... Kinetic theory provides insight into the macroscopic properties of gases by considering their molecular composition and motion ... Starting with the definitions of momentum and kinetic energy, one can use the conservation of momentum and geometric relationships of a cube to relate macroscopic system properties of temperature and pressure to the ... The theory provides averaged values for these two properties ...

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