# Ideal gas law

equation of state of a hypothetical ideal gas; approximation of the behavior of many gases under many conditions (although it has several limitations)

The ideal gas law is the equation of a possible ideal gas, first made by Benoît Paul Émile Clapeyron in 1834.

The state or amount of an amount of gas is found by using its pressure, volume, and temperature in the equation:

${\displaystyle \ pV=nRT}$

where

${\displaystyle \ p}$ is the absolute pressure of the gas,
${\displaystyle \ V}$ is the volume of the gas,
${\displaystyle \ n}$ is the number of moles of gas,
${\displaystyle \ R}$ is the universal gas constant,
${\displaystyle \ T}$ is the absolute temperature.