December 30, 2024, 09:29:08 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Fugacity  (Read 6712 times)

0 Members and 1 Guest are viewing this topic.

material

  • Guest
Fugacity
« on: August 09, 2005, 11:00:11 AM »
Pls, I need the explanation of the physical property,called fugacity.
Logged

Offline Donaldson Tan

  • Editor, New Asia Republic
  • Retired Staff
  • Sr. Member
  • *
  • Posts: 3177
  • Mole Snacks: +261/-13
  • Gender: Male
    • New Asia Republic
Re:Fugacity
« Reply #1 on: August 09, 2005, 11:32:51 AM »
think fugacity as a pseudo pressure.

isothermal change for a perfect gas: dg = v dp = RT (dp/p)

the Gibbs free energy of a real gas is therefore: dg = v dp = RT (df/f) where f is fugacity

notice that p is replaced with f in the real gas function.

fugacity is a measure of deviation of real gas from the ideal gas model.
« Last Edit: August 09, 2005, 11:33:53 AM by geodome »
Logged
"Say you're in a [chemical] plant and there's a snake on the floor. What are you going to do? Call a consultant? Get a meeting together to talk about which color is the snake? Employees should do one thing: walk over there and you step on the friggin� snake." - Jean-Pierre Garnier, CEO of Glaxosmithkline, June 2006

Offline Mitch

  • General Chemist
  • Administrator
  • Sr. Member
  • *
  • Posts: 5298
  • Mole Snacks: +376/-3
  • Gender: Male
  • "I bring you peace." -Mr. Burns
    • Chemistry Blog
Re:Fugacity
« Reply #2 on: August 09, 2005, 03:14:19 PM »
Basically, its how much the data needs to be "fudged" in order replicate theory.
Logged
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex

ppithermo

  • Guest
Re:Fugacity
« Reply #3 on: September 12, 2005, 05:42:55 PM »
 ;D
Fugacity has the dimension of a pressure.

the ratio of the fugacity  to the pressure is the fugacity coefficient.

It gives a measure of "how much" a gas deviates from an ideal gas.

For an ideal gas, fugacity and pressure are identical
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links