The Ideal Gas Law is one of the Equations of State. Although the law describes the behavior of an ideal gas, the equation is applicable to real gases under many conditions, so it is a useful equation to learn to use. The Ideal Gas Law may be expressed as:
PV = NkT
where:
P = absolute pressure in atmospheres
V = volume (usually in liters)
n = number of particles of gas
k = Boltzmann's constant (1.38·10−23 J·K−1)
T = temperature in Kelvin
