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fugacity    
n. 易逃逸,不安定,无常

易逃逸,不安定,无常

fugacity
n 1: the tendency of a gas to expand or escape
2: the lack of enduring qualities (used chiefly of plant parts)
[synonym: {fugacity}, {fugaciousness}]

Fugacity \Fu*gac"i*ty\, a. [L fugacitas: cf. F. fugacit['e].]
1. The quality of being fugacious; fugaclousness; volatility;
as, fugacity of spirits. --Boyle.
[1913 Webster]

2. Uncertainty; instability. --Johnson.
[1913 Webster]


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  • What is fugacity? - Chemistry Stack Exchange
    The fugacity of a molecular species is the same in two phases when these phases are in equilibrium as regards the distribution of that species The fugacity of a gas approaches the gas pressure as a limiting value if the gas is indefinitely rarefied In other words, the escaping tendency of a perfect gas is equal to its gas pressure
  • Is fugacity the corrected pressure that should be used in . . .
    Fugacity is not the actual pressure It is used to account for the real behaviour of gasses and also to overcome the assumption that chemical potential for a real gas can be based on using that based on an ideal gas $\mu=\mu^\text {o}+RT\ln (P (atm) 1 (atm))$ rather than starting over again with, say, the van der Waals eqn
  • Physical significance of chemical potential and fugacity
    The mathematical relation between fugacity and chemical potential was chosen to resemble that between partial pressure and chemical potential in the ideal state This allows one formulation to describe both real scenarios and the limiting ideal case
  • Fugacity vs compressibility - Chemistry Stack Exchange
    if the criterion is fugacity, it is not so intuitive to say that the forces of attraction are dominant and the real gas has a molar volume greater than that of an ideal gas
  • For one of the following, determine the ratio of the fugacity in the . . .
    For one of the following, determine the ratio of the fugacity in the final state to that in the initial state for steam undergoing the isothermal change of state: (a) From 9000 kPa and 400°C to 300 kPa (b) From 1000 (psia) and 800 (°F) to 50 (psia)
  • 11. 18. Estimate the fugacity of isobutylene as a gas: (a) At . . . - bartleby
    Q: Q4) Estimate the fugacity of isobutylene as a gas: (a) At 280°C and 20 bar (by using 2nd virial… Q: Q2: Provide an expression for the isothermal compressibility with a gas follows the ollowing… Q: At low pressures, the compressibility factor of a van der Waals gas is given by the equation: PV a P… Q: 2
  • Answered: Derive the formula for fugacity according to the Van der . . .
    Derive the formula for fugacity according to the Van der Waals equation Use the result to calculate the fugacity (bar) of ethane at 320 K and at a molar volume of 150 cm3 mole
  • Answered: The Lewis-Randall rule for f (T, P, {y}), the fugacity of . . .
    The Lewis-Randall "rule" for f (T, P, {y}), the fugacity of component i in a gas mixture, is an approximation given by f (T, P, ty)syf (T, P), where f (T, P) is the fugacity of pure component i at temperature T and pressure P Show that a mixture described by the Lewis-Randall rule has the property that the enthalpy and volume of mixing are both zero
  • When is the activity of a gas given by its partial pressure?
    The fugacity coefficient is a measure of non-ideality owing to the intermolecular forces between molecules At high pressures, the forces are significant and so the system is non-ideal, $\phi$ is not one, and the fugacity does not approximate the partial pressure, even though the partial pressure is small
  • 11. 19. Estimate the fugacity of one of the following: (a . . . - bartleby
    Estimate the fugacity of one of the following: (a) Cyclopentane at 383 15 K (110°C) and 275 bar At 383 15 K (110°C) the vapor pressure of cyclopentane is 5 267 bar





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