Fugacity of a Single Component: Summary



Key points from this module:
  1. Fugacity is an intensive variable, so it does not depend on the amount of the phase.
  2. Fugacity is the driving force for mass transfer, not concentration.
  3. The fugacity for a single-component ideal gas is equal to its pressure.
  4. The fugacity for a single-component liquid is equal to its saturation pressure if pressure is low enough that the gas phase is ideal.
  5. The fugacity of a single-component, non-ideal gas is less than its pressure and approaches the pressure as the temperature increases.
  6. When phases are in equilibrium for a single-component, the fugacity of that component is the same in each phase. 

From studying this module, you should now be able to:
  1. Calculate fugacity of a single-component ideal gas.
  2. Calculate the fugacity of a liquid or a solid. 
  3. Calculate the fugacity of a non-ideal gas.