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Charles's law From Wikipedia, the free encyclopedia Jump to: navigation, search An animation demonstrating the relationship between volume and temperature. Continuum mechanics BernoullisLawDerivationDiagram.svg Laws[show] Solid mechanics[show] Fluid mechanics[show] Rheology[show] Scientists[show]

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Charles's law (also known as the law of volumes) is an experimental gas law which describes how gases tend to expand when heated.

A modern statement of Charles's law is:

At constant pressure, the volume of a given mass of an ideal gas increases or decreases by the same factor as its temperature on the absolute temperature scale (i.e. the gas expands as the temperature increases).[1]

which can be written as:

V \propto T\,

where V is the volume of the gas; and T is the absolute temperature. The law can also be usefully expressed as follows:

\frac{V_1}{T_1} = \frac{V_2}{T_2} \qquad \mathrm{or} \qquad \frac {V_2}{V_1} = \frac{T_2}{T_1} \qquad \mathrm{or} \qquad V_1 T_2 = V_2 T_1.

The equation shows that, as absolute temperature increases, the volume of the gas also increases in proportion. Contents

1 History 2 Relation to the ideal gas law 3 Relation to absolute zero 4 Relation to kinetic theory 5 See also 6 References 7 Further reading 8 External links