fugacity

USAGE SUMMARY

The phrase "fugacity" is correct and usable in written English.
It is typically used in thermodynamics and chemistry to describe the tendency of a substance to escape or be released from a phase, often in relation to gases. Example: "The fugacity of the gas increases with temperature, indicating a greater tendency to escape from the liquid phase."

✓ Grammatically correct

Encyclopedias

Science

Human-verified examples from authoritative sources

Exact Expressions

9 human-written examples

Molecules of component A are free to pass back and forth through the membrane, but, at equilibrium, when the fugacity (escaping tendency) of A in the right-hand side is the same as that in the left-hand side, there is no net transfer of A from one side to the other.

Encyclopedia Britannica

Assuming ideal gas behaviour for the vapour phase, the fugacity (yiP) equals the product of the liquid-phase mole fraction, xi, the vapour pressure of pure liquid at the same temperature as that of the mixture, Pi°, and the activity coefficient, γi.

Encyclopedia Britannica

On the left side, the presence of B molecules lowers the fugacity of A, and, therefore, to achieve equal fugacities for A on both sides, some compensating effect is needed on the left side.

Encyclopedia Britannica

If the vapour phase can be considered to be an ideal gas (i.e., the molecules in the gas phase are assumed to act independently and without any influence on each other), then the fugacity of a component, i, is equal to its partial pressure, which is defined as the product of the total vapour pressure, P, and the vapour-phase mole fraction, yi.

Encyclopedia Britannica

Fugacity, a measure of the tendency of a component of a liquid mixture to escape, or vaporize, from the mixture.

Encyclopedia Britannica

This tendency is measured by fugacity, a term derived from the Latin fugere ("to escape, to fly away").

Encyclopedia Britannica

The fugacity of a component in a mixture is (essentially) the pressure that the component exerts in the vapour phase when the vapour is in equilibrium with the liquid mixture.

Encyclopedia Britannica

The fugacity of a component in a mixture is essentially the pressure that it exerts in the vapour phase when in equilibrium with the liquid mixture.

Encyclopedia Britannica

A fugue may be at its best when it has all the virtues of fugacity; but law is not best when it excels in legality; law must also be just.

SEP

Expert writing Tips

Best practice

Since "fugacity" is a somewhat obscure term, provide more context by stating what exactly has fugacity (e.g., 'the fugacity of the gas' rather than simply 'the fugacity').

Common error

Don't use "fugacity" as a general term for transience or instability. It has a specific technical meaning in thermodynamics related to escaping tendency or chemical potential.

Linguistic Context

The term "fugacity" functions as a noun, specifically referring to a measure of the escaping tendency or chemical potential of a substance, predominantly used in thermodynamics and chemistry. Ludwig AI examples confirm its use in describing the behavior of components in mixtures and solutions.

Expression frequency: Uncommon

Frequent in

Encyclopedias

77%

Science

23%

Formal & Business

0%

Less common in

News & Media

0%

Social Media

0%

Wiki

0%

Ludwig's WRAP-UP

In summary, "fugacity" is a noun primarily used in scientific contexts, specifically thermodynamics and chemistry, to describe the escaping tendency or chemical potential of a substance. Ludwig AI examples highlight its role in quantifying behavior under non-ideal conditions. While grammatically correct, the term is uncommon and requires careful contextualization for non-expert audiences. Alternatives like "escaping tendency" may be more appropriate in simpler contexts. Therefore, while accurate in its field, "fugacity" demands precision and awareness of its technical meaning. The Ludwig AI analysis also confirms the validity and specialized application of this term.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

escaping tendency

Focuses specifically on the tendency to escape from a phase or mixture.

chemical potential

Refers to the thermodynamic measure of the potential of a substance to undergo a chemical reaction or phase change.

vapor pressure

Highlights the pressure exerted by a vapor in equilibrium with its condensed phases.

activity coefficient

Describes the deviation from ideal behavior in a mixture.

escaping ability

Emphasizes the capacity of a substance to escape.

volatility

Refers to the tendency of a substance to vaporize.

tendency to vaporize

Directly describes the inclination of a substance to become a vapor.

evaporation rate

Quantifies the speed at which a substance evaporates.

partial pressure

Specifies the pressure exerted by an individual component in a mixture of gases.

equilibrium pressure

Describes the pressure at which a substance is in equilibrium between its phases.

FAQs

How is "fugacity" used in chemistry?

"Fugacity" is used to describe the escaping tendency of a substance from a particular phase. It's a corrected pressure that accounts for non-ideal behavior, especially in gases.

What is the difference between "fugacity" and pressure?

Pressure is the actual force exerted by a gas, while "fugacity" is an adjusted pressure that accounts for non-ideal behavior. At low pressures, they are nearly equal, but at high pressures, "fugacity" provides a more accurate representation of the substance's behavior.

When should I use "fugacity" instead of pressure?

Use "fugacity" when dealing with non-ideal gases or liquids, especially at high pressures or concentrations where intermolecular forces significantly affect the substance's behavior. In ideal conditions, pressure is sufficient.

Are there simpler alternatives to the term "fugacity"?

Yes, in less technical contexts, you can use alternatives like "escaping tendency" or "volatility", depending on the specific aspect you want to emphasize. But be mindful that those alternatives might not be precise in scientific use-cases.