This article outlines the historical development of the laws describing ideal gases. For a detailed description of the ideal gas laws and their further development see ideal gas law.
The gas laws were developed at the end of the 18th century, when scientists began to realize that relationships between pressure , volume and temperature of a sample of gas could be obtained which would hold to approximation for all gases. Gases behave in a similar way over a wide variety of conditions because they all have molecules which are widely spaced, and the equation of state for an ideal gas is derived from kinetic theory. The earlier gas laws are now considered as special cases of the ideal gas equation , with one or more variables held constant.
The concept can be represented with these formulae:
Charles's law, or the law of volumes, was found in 1787 by Jacques Charles. It states that, for a given mass of an ideal gas at constant pressure, the volume is directly proportional to its absolute temperature , assuming in a closed system.
The statement of Charles' law is as follows: the volume (V) of a given mass of a gas, at constant pressure (Pa), is directly proportional to its temperature (K). As a mathematical equation, Charles's law is written as either:
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