fugacity

For an ideal gas, fugacity and pressure are equal so is 1.

When dealing with gases, fugacity, f, is used rather than activity.

In modelling strategies, however, the concept of fugacity is given a whole section.

For gases, the effective partial pressure is usually referred to as fugacity.

The reaction is used to control the fugacity of oxygen in laboratory experiments.

However, whereas activity is dimensionless, fugacity has the dimension of pressure.

This hope was not realized, though fugacity did find a lasting place in the description of real gases.

In thermodynamics, the fugacity is a state function of any isothermal system.

Introduction to fugacity: Where did it come from?

For gases at low pressures where the ideal gas law holds, fugacity is equal to pressure.

The fugacity is closely related to the thermodynamic activity.

Accurate calculations of chemical equilibrium for real gases should use the fugacity rather than the pressure.

Yet fugacity allows the use of many of the relationships developed for an idealized system.

Frequently, the fugacity of the pure liquid is used as a reference state when using activity coefficients.

In the real world, for example, when making ammonia in industry, fugacity coefficients must be taken into account.

Fugacity is another predictive criterion for equilibrium among phases that has units of pressure.

The parameter is called fugacity, and it represents the ease of adding a new particle into the system.

An equivalent statement uses thermodynamic activity instead of fugacity.

The following list gives the fugacity capacities for common medias:

The fugacity is defined at fixed temperature by the following differential relation:

Equilibrium constants are defined in terms of fugacity.

Lewis introduced the thermodynamic concept of activity and coined the term "fugacity".

For a gas, the activity is simply the fugacity divided by a reference pressure to give a dimensionless quantity.

At pressures above the saturation pressure, liquid phase fugacity is:

For equilibria in a gas phase, fugacity, f, is used in place of activity.