The equation that characterizes any amount of a gas is
where is the pressure, the volume, the number of the gas moles and the absolute temperature of the gas; the universal gas constant (approximately 8.314472
).
The gas law is accurately valid for an ideal gas, but a good approximation for real gases.
The law contains the following gas laws:
Boyle-Mariotte law ( constant when and are constants)
Gay-Lussac law (
constant when and are constants)
Avogadro's law (in equal conditions, equal volumes of different gases contain the same number of molecules)
The ideal gas law can also be defined using Boltzmann's constant:
The symbols are those defined above, with the difference that is the number of gas molecules, and is the Boltzmann constant,
JK . This form is often preferred by physicists who consider the number of molecules to be more fundamental than the number of moles.
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This is version 8 of ideal gas law, born on 2006-05-27, modified 2008-11-24.
Object id is 178, canonical name is IdealGasLaw.
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JK