Activity vs. Fugacity

Activitynoun

(uncountable) The state or quality of being active; activeness; the state of having many things happening

Activitynoun

(countable) Something done as an action or a movement.

Activitynoun

(countable) Something done for pleasure or entertainment, especially one involving movement or an excursion.

Activitynoun

Use (of internet, Playstation, bank account etc.).

Activitynoun

The lexical aspect (aktionsart) of verbs or predicates that change over time and have no natural end point.

Activitynoun

The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities.

Activitynoun

any specific activity;

Activitynoun

the state of being active;

Activitynoun

an organic process that takes place in the body;

Activitynoun

(chemistry) the capacity of a substance to take part in a chemical reaction;

Activitynoun

a process existing in or produced by nature (rather than by the intent of human beings);

Activitynoun

the trait of being active; moving or acting rapidly and energetically;

Fugacitynoun

A measure of the tendency of a fluid to expand or escape.

Fugacitynoun

(physics) A measure of the relative stability of different phases of a substance under the same conditions.

Fugacitynoun

Transience.

Fugacityadjective

The quality of being fugacious; fugaclousness; volatility; as, fugacity of spirits.

Fugacityadjective

Uncertainty; instability.

Fugacitynoun

the tendency of a gas to expand or escape

Fugacitynoun

the lack of enduring qualities (used chiefly of plant parts)

Fugacity

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.Fugacities are determined experimentally or estimated from various models such as a Van der Waals gas that are closer to reality than an ideal gas.