Excess size

An excess is a property of a mixture of substances that describes the deviation from ideal behavior.

Typical excess sizes are

• Mixture warming ${\displaystyle h^{E}}$
• Free excess enthalpy : is used to determine activity coefficients using so-called models ${\displaystyle g^{E}}$ ${\displaystyle g^{E}}$
• Excess heat capacities ${\displaystyle c_{p}^{E}}$
• Excess volumes ${\displaystyle v^{E}}$
• Excess pressure : Deviation of the vapor pressure from the ideal behavior according to Raoult ${\displaystyle p^{E}}$

See also

• Dortmund database (also contains some excess sizes)