Before finishing the question check this list:
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Units are correct!!!! And make sure to include time /s /h /min
Reread question to understand what he’s asking
Make sure it’s not remaining!
Box All final answers!
Equations:
Clausius-Clapeyron:
Ln[P1/P2] = [Hvap/R]*[1/T2-1/T1]
R = 8.314 J/mol K
Hvap will be in Joules/mol
T = Kelvin
Antoine Equation:
Log10(P*)= A- (B/(C+T))
Log10(P*) = P*= 10^(A-B/(C+T))
For conversion:
1 lb-mole * (454g/1lb) = gmol = mol
(1 lb-mole/454mol)
To calculate a volume of a liquid
Volume of the liquid = Vcontainer-Vgas
Volume of gas: (which can be found using IDGEOS plugging vapor pressure and number of moles of vapor )
SCMH = standard cubic meter/hour
SCFM = standard cubic ft/min
Hydrogen and Helium correction factor:
Tc + 8k
Pc + 8atm
To get absolute pressure always add 1 atm to the Gauge pressure.
To get moles fraction of vapor to liquid, divide vapor pressure by absolute pressure of the container
SRK is the most accurate but only applies to limited set of pure species.
For SRK use 0.08206 units will cancel out
Kay’s Rule/Compressibility factor is the only option for gas mixtures
When you do DOF
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Make sure to re-read the question to see if he asks about “Remaining” unknowns
When you do DOF for unreactive units you can only use Molecular balance
When you do DOF for reactive units you can only use Extensive or Atomic bal
When you write independent balances make sure that this is in fact independent by looking if there’s a
way to make those equal to each other by multiplication or division otherwise it should be independent
5- If you made any assumptions state it.
Definitions:
Tcrit = or a pure substance is the temperature above which the gas cannot become liquid,
regardless of the applied pressure.
Pcrit = the pressure above which liquid and gas cannot coexist at any temperature.
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