Equations Of State - Micromeritics ASAP 2020 Confirm Operator's Manual

ASAP 2020 Confirm

Equations of State

The ideal gas law relates pressure, volume, temperature, and quantity of gas.
n =
where
P
V
T
R
The non-ideality correction is made by replacing P with P(1 +
ality factor. This gives
n =
The real gas equation of state uses
n =
where z(P,T) is the compressibility factor for the gas at the given pressure and temperature.
C-4
PV
------ -
RT
= pressure
= volume
= temperature
= a constant that depends on the units of n.
3
For n in cm STP, R = P
For n in moles, R = 8.3145 J mol
PV
P 
------ - (1
+
RT
PV
------------------------ -
  
RTz P T
/ T
STD STD
-1 -1
K
Appendix C
 
P), where is the non-ide-
202-42811-01 - Mar 2011