ideal gas law
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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As of this snapshot date, this entry was owned by pahio.