CHARLES' LAW

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: ===When the pressure on a sample of a dry gas is held constant, the Kelvin temperature and the volume will be directly related.=== this directly proportional relationship can be written as: $$V \propto T$$ or $$\frac{V}{T}=k$$ where: V is the volume of the gas T is the temperature of the gas (measured in Kelvin). k is a constant. This law describes how a gas expands as the temperature increases; conversely, a decrease in temperature will lead to a decrease in volume. For comparing the same substance under two different sets of conditions, the law can be written as: $$\frac{V_1}{T_1} = \frac{V_2}{T_2} \qquad \mathrm{or} \qquad \frac {V_2}{V_1} = \frac{T_2}{T_1} \qquad \mathrm{or} \qquad V_1 T_2 = V_2 T_1$$ [image:http://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Charles_and_Gay-Lussac%27s_Law_animated.gif/300px-Charles_and_Gay-Lussac%27s_Law_animated.gif]