- V is the volume of the gas.
- n is the amount of substance of the gas.
- k is a proportionality constant.
The most important consequence of Avogadro's law is that the ideal gas constant has the same value for all gases. This means that the constant
- p is the pressure of the gas
- T is the temperature of the gas
has the same value for all gases, independent of the size or mass of the gas molecules.
One mole of an ideal gas occupies 22.4 liters (dm³) at STP, and occupies 24.45 litres at SATP (Standard Ambient Temperature and Pressure = 273K and 1 atm or 101.325 kPa). This volume is often referred to as the molar volume of an ideal gas. Real gases may deviate from this value.