What does fugacity mean?

Definitions for fugacity
fyuˈgæs ɪ tifu·gac·i·ty

This dictionary definitions page includes all the possible meanings, example usage and translations of the word fugacity.

Princeton's WordNet

  1. fugacitynoun

    the tendency of a gas to expand or escape

  2. fugacity, fugaciousnessnoun

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

Wiktionary

  1. fugacitynoun

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

  2. fugacitynoun

    A measure of the relative stability of different phases of a substance under the same conditions

  3. fugacitynoun

    Transience

Samuel Johnson's Dictionary

  1. Fugacitynoun

    Etymology: fugax, Latin.

    Spirits and salts, which, by their fugacity, colour, smell, taste,and divers experiments that I purposely made to examine them, were like the salt and spirit of urine and soot. Boyle.

Wikipedia

  1. 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. The real gas pressure and fugacity are related through the dimensionless fugacity coefficient φ. For an ideal gas, fugacity and pressure are equal and so φ = 1. Taken at the same temperature and pressure, the difference between the molar Gibbs free energies of a real gas and the corresponding ideal gas is equal to RT ln φ. The fugacity is closely related to the thermodynamic activity. For a gas, the activity is simply the fugacity divided by a reference pressure to give a dimensionless quantity. This reference pressure is called the standard state and normally chosen as 1 atmosphere or 1 bar. Accurate calculations of chemical equilibrium for real gases should use the fugacity rather than the pressure. The thermodynamic condition for chemical equilibrium is that the total chemical potential of reactants is equal to that of products. If the chemical potential of each gas is expressed as a function of fugacity, the equilibrium condition may be transformed into the familiar reaction quotient form (or law of mass action) except that the pressures are replaced by fugacities. For a condensed phase (liquid or solid) in equilibrium with its vapor phase, the chemical potential is equal to that of the vapor, and therefore the fugacity is equal to the fugacity of the vapor. This fugacity is approximately equal to the vapor pressure when the vapor pressure is not too high.

ChatGPT

  1. fugacity

    Fugacity is a thermodynamic property used to predict the phase behavior of single and mixed component systems. It is defined as the hypothetical pressure of a gas that would be in equilibrium with the gas in its current state, taking into account non-ideal behavior. In simpler terms, fugacity is a measure of a substance's tendency to escape or expand and can be seen as a corrected pressure for real gases.

Webster Dictionary

  1. Fugacityadjective

    the quality of being fugacious; fugaclousness; volatility; as, fugacity of spirits

  2. Fugacityadjective

    uncertainty; instability

  3. Etymology: [L fugacitas: cf. F. fugacit.]

Wikidata

  1. Fugacity

    In chemical thermodynamics, the fugacity of a real gas is an effective pressure which replaces the true mechanical pressure in accurate chemical equilibrium calculations. It is equal to the pressure of an ideal gas which has the same chemical potential as the real gas. For example, nitrogen gas at 0°C and a pressure of has a fugacity of . This means that the chemical potential of real nitrogen at a pressure of 100 atm is less than if nitrogen were an ideal gas; the value of the chemical potential is that which nitrogen as an ideal gas would have at a pressure of 97.03 atm. 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. The ideal gas pressure and fugacity are related through the dimensionless fugacity coefficient . For nitrogen at 100 atm, the fugacity coefficient is 97.03 atm / 100 atm = 0.9703. For an ideal gas, fugacity and pressure are equal so is 1. The contribution of nonideality to the chemical potential of a real gas is equal to RT ln . Again for nitrogen at 100 atm, the chemical potential is μ = μid + RT ln 0.9703, which is less than the ideal value μid because of intermolecular attractive forces.

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Numerology

  1. Chaldean Numerology

    The numerical value of fugacity in Chaldean Numerology is: 9

  2. Pythagorean Numerology

    The numerical value of fugacity in Pythagorean Numerology is: 2

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"fugacity." Definitions.net. STANDS4 LLC, 2024. Web. 29 Mar. 2024. <https://www.definitions.net/definition/fugacity>.

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    a consonant produced by stopping the flow of air at some point and suddenly releasing it
    A occlusive
    B adscripted
    C eloquent
    D indiscernible

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