1 / 1

Step 1 : Is the gas ideal or non-ideal? (Page 192)

Non-Ideal Gases: How do you relate P, V, T?. Non-ideal if:. Step 1 : Is the gas ideal or non-ideal? (Page 192). If ideal, use PV = nRT. Step 2 : Non-ideal? Choose an approach Equation of State Compressibility Factor. Equations of State give analytic solutions

lewis-glass
Download Presentation

Step 1 : Is the gas ideal or non-ideal? (Page 192)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Non-Ideal Gases: How do you relate P, V, T? Non-ideal if: Step 1: Is the gas ideal or non-ideal? (Page 192) If ideal, use PV = nRT • Step 2: Non-ideal? Choose an approach • Equation of State • Compressibility Factor • Equations of State give analytic solutions • There are several EOS to choose from • SRK explained on p. 203 • “plug and chug” to solve Eqn 5.3-7 below • Compressibility factor “Z” • PV = znRT (z is “fudge factor”) • Calculate (2 of 3) Pr, Tr, Vr • Plots on p. 208-210 • Find where Pr, Vr, or Tr intersect and read Z PV = znRT Notes: 1. Non-ideal gases use “reduced” values for P, T, V so that “universal” equations and plots can be used. Otherwise, every gas (e.g., nitrogen, propane, etc) would have different plots and equations relating P, T, V. 2. is the molar volume = volume divided by the moles (vol/mol) 3. Kay’s Rule: If you have more than one component, the “pseudocritical” T and P are “weighted” by their mole fractions (pg. 211)

More Related