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The Kinetic Molecular Theory of Gases Learning Goal: To understand some aspects of molecular motion in the gas phase.

The Kinetic Molecular Theory of Gases
Learning Goal:
To understand some aspects of molecular motion in the gas phase.
The kinetic molecular theory of gases explains how gas molecules behave in terms of motion, speed, and energy.

One important aspect of this theory deals with the relationship between temperature and the average speed of the gas molecules. Increasing the temperature of a gas sample increases the average kinetic energy of the molecules. The kinetic energy of a molecule determines its speed. It is important to realize that not all molecules in a sample will have the same kinetic energy, which is why we refer to the average kinetic energy and the average speed. The speed of a particle with average kinetic energy is called the root mean square (rms) speed, vrms.

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