The compressibility factor (Z) is a dimensionless quantity used in thermodynamics and fluid mechanics to describe the deviation of a real gas from ideal gas behavior. It is defined as the ratio of the molar volume of a real gas to the molar volume of an ideal gas at the same temperature and pressure.
The formula for the compressibility factor (Z) is as follows:
Where:
- is the compressibility factor (dimensionless)
- is pressure (SI unit: pascals, Pa)
- is volume (SI unit: cubic meters, m³)
- is the universal gas constant (SI unit: joules per mole per Kelvin, J/(mol·K))
- is temperature (SI unit: Kelvin, K)
So, all the variables in the formula have SI units.