Week 3 Lecture 4 Flashcards
Dalton’s law
sum of partial pressures = total pressure
Amagat’s law
total volume of a mixture = sum of partial volumes at the pressure P and temperature T
For ideal gas phase systems, Dalton’s law and Amagat’s law are both ____ simultaneously
valid
For real multicomponent systems, Dalton’s Law of Additive Pressures is reasonable valid at relatively ____ pressures
low
PT < 50atm
partial pressure of component using the non ideal has equation
partial pressure = ZnRT/V
Dalton’s law is invalid for the real closed gas phase system at ____ pressures
high
When Dalton’s law is invalid for the real closed gas phase system (at high pressures) then ________ can be used
Amagat’s law
partial pressure of component using the non ideal has equation
partial volume = ZnRT/P
used when the system pressure is between 50atm and 300atm
pseudocritical point (kays rule) method
System reduced temperature equation
temperature / pseudocritical temperature
System reduced pressure
pressure / pseudocritical pressure
Used to find the compressibility factor Zm
- system reduced temperature
- system reduced pressure
Kay’s rule equation temperature
pseudocritical temperature = Σyi Tc
Tc = critical temperature
yi = mole fraction of each component
Kay’s rule equation pressure
pseudocritical temperature = Σyi Pc
Tc = critical temperature
yi = mole fraction of each component
way of simulating non-ideal gas phase systems including the two phase boundary region.
It models the intermolecular forces including the two phase liquid-vapour region
fugacity
When fugacity = pressure the system is ….
ideal
The fugacity coefficient φ is…
dimensionless
Fugacity equation
fugacity/pressure = fugacity coefficient
f/P = φ
temperature of a gas above which it cannot be liquefied by pressure alone
critical temperature
https://languages.oup.com/about-us/case-studies/ecosia/
pressure of a gas above which it cannot be liquefied by temperature change alone
critical pressure
https://languages.oup.com/about-us/case-studies/ecosia/
Ideal volume assumption
𐤃V = 0
Can be non ideal for example when mixtures containing polar species and then more sophisticated methods are needed.
system density =
system density = Σ(xi ρi)
xi = mole fraction of molecular species i
ρi = pure component density
