Fugacity Tank Tops

Description: A black background features two lines of bold, white capital letters. The top line reads "WHAT IS" and the bottom line reads "FUGACITY?". The text is simple, strong, and presented without any additional embellishments or graphics.

Description: In chemical thermodynamics, the fugacity of a real gas is an effective partial pressure which replaces the mechanical partial pressure in an accurate computation of the chemical equilibrium constant. It is equal to the pressure of an ideal gas which has the same temperature and molar Gibbs free energy as the real gas.