Term
Ideal Gas Calculation Valid?
(Diatomic Gases) 

Definition
error is less than 1% if the ideal specific volume is greater than 5 L/mol
Calculation:
ideal specific volume = (R*T)/P 


Term
Ideal Gas Equation Valid?
(nondiatomics) 

Definition
error is less than 1% if the ideal specific volume is greater than 20 L/mol Calculation: ideal specific volume = (R*T)/P 


Term

Definition
T = 273 K
P = 1 atm
V = 0.022415 m^3
n = 1 mol 


Term

Definition
T=273 K
P= 1 atm
V= 22.415 L
n= 1 mol 


Term
Standard Conditions Amer. E. 

Definition
T= 492 R
P=1 atm
V= 359.05 ft^3
n=1 lbmole



Term
Conversion from Standard Conditions 

Definition
(P*V)/(Ps*(specific volume at s)) = n*(T/Ts) 


Term

Definition


Term
Mole Fraction and Volume Fraction 

Definition


Term
Reduced Temperature and Pressure 

Definition


Term
Compressibility Factor 'z' 

Definition
z = (P*specificV)/(R*T)
use compressibility chart to find z
using Vr(ideal), Tr, and/or Pr 


Term

Definition
For Helium and Hydrogen
Tc(correction) = Tc + 8 K
Pc(correction) = Pc + 8 atm 


Term

Definition
as power series usually truncated after first term
uses 'w' Pitzer acentric factor
uses reduced temperature



Term

Definition
includes van der Waals
includes SRK equation 


Term

Definition
Memorize in book
also memorize constants 


Term
Law of Corresponding States 

Definition
the values of certain physical properties of a gas such as compressibility factor depend to great extent on the proximity of the gas to its critical value 


Term

Definition
relates the molar quantity and volume of a gas to temperature and pressure 


Term
Kinetic Theory of Gases Assumptions for the Ideal Equation of State 

Definition
gas molecules have negligible volume
exert no forces on one another
collide elastically with the walls of the container 


Term
Density in terms of the ideal gas equaiton 

Definition
density = P*(Average MW of a gas)/(R*T) 


Term

Definition
T(R) = T(F) + 459.69
T(R) = 1.8T(K) 


Term

Definition
used in compressibility chart
Vr(ideal) = ((critical pressure) * (specific volume))/(R*(critical temp)) 


Term

Definition
M(avg) = ya(MWa) + yb(MWb) 


Term

Definition
T'c = ya(Tca) + yb(Tcb)+....
P'c = ya(Pca) + yb(Rcb)+... 


Term
Liquid and Solid Density Calculations 

Definition
1/density(avg) = sigma((mass fraction of i) /(density of i))
assumes volume additivity (good for species with similar structures)
density(avg) = sigma((mass fraction of i)*(density of i)) 

