Absolute Temperature

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Absolute Temperature (The Third Law of Thermodynamics)

As substances cool, their molecules move with less speed and their kinetic energy decreases. Actually, it can be shown that the kinetic energy of particles is directly proportional to the temperature. To rephrase, temperature can be seen as a measure of the kinetic energy of particles. It is therefore easy to understand that at temperatures of absolute zero, all molecular motions stop, and entropy approaches zero.

The Third Law of Thermodynamics:

There is a temperature so low that it cannot be reached. This temperature is called absolute zero kelvin (-273.15°C)


(1) Toossi Reza, "Energy and the Environment:Sources, technologies, and impacts", Verve Publishers, 2005

Further Reading

El-Sayed, Y., The Thermodynamics of Energy Conversions, Elsevier Direct Science, 2003.

Cengel, Y. A., Heat Transfer: A Practical Approach, McGraw-Hill, Inc., 1998.

Rifkin, J., Entropy, The Viking Press, 1980.

El-Wakil, M/ M., Power Plant Technology, McGraw-Hill, Inc., 1984.

Energy and Buildings, Science Direct Elsevier Publishing Company. An international journal publishing articles about energy use in buildings and indoor environment quality.

Energy Conversion and Management, Science Direct Elsevier Publishing Company. This journal focuses on energy efficiency and management; heat pipes; space and terrestrial power systems; hydrogen production and storage; renewable energy; nuclear power; fuel cells and advanced batteries.

Energy and Buildings, Science Direct Elsevier Publishing Company, An international journal dedicated to investigations of energy use and efficiency in buildings.

External Links

How Things Work (http://howthingswork.virginia.edu).

How Stuff Works (http://www.howstuffworks.com).

California Energy Commission Consumer Energy Center (http://www.consumerenergycenter.org).