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kinetic theory

physics
Also known as: kinetic molecular theory of heat

Quick Summary

The kinetic theory of gases is a fundamental concept in physics that explains the macroscopic properties of gases by considering the motion of their constituent particles. It posits that gases are composed of numerous molecules in constant, random motion. These molecules collide elastically with each other and the container walls, and these collisions are responsible for the gas's pressure.12

Key assumptions of the simplest kinetic model include:
* A large number of identical molecules moving randomly.1
* Molecules are separated by large distances and do not interact except during perfectly elastic collisions.1
* Collisions involve the transfer of kinetic energy, which is related to heat.1

This model describes a perfect gas, which is a good approximation for real gases under certain conditions. The theory connects pressure and temperature to the average kinetic energy of the molecules. It also helps explain other gas properties like viscosity, conductivity, and diffusion.12

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