Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
General Engineering
Mechanical Engineering
Electrical Engineering
Aerospace Engineering
Nuclear Engineering
Materials Engineering
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
General Engineering
Mechanical Engineering
Electrical Engineering
Aerospace Engineering
Nuclear Engineering
Materials Engineering
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Engineering
Materials and Chemical Engineering
Departure enthelpy for mixture EOS = enthelpy of mixing?
Reply to thread
Message
[QUOTE="maistral, post: 6567497, member: 419533"] Hi. I am well aware that if say, there are two components A and B, the [B][I]ideal[/I] [/B]mixing enthalpy between those two components are: (1) h[sub]mix[/sub] = z[sub]A[/sub] h[sub]A[/sub] + z[sub]B[/sub] h[sub]B[/sub]. If I want to get the real behavior of a [B]pure[/B] component, I am also aware that; say for example, liquid enthalpy: (2) h[sub]L[/sub] = H[sub]ref[/sub] + ∫Cp[sub]ig[/sub]dT (from T[sub]ref[/sub] → T) + h[sub]RL[/sub] I am assuming that if I want to calculate the, say, [B][I]non-ideal[/I][/B] liquid enthalpy of a mixute A and B, the following holds true: (3) h[sub]Lmix[/sub] = x[sub]A[/sub] h[sub]L,A[/sub] + x[sub]L,B[/sub] h[sub]B[/sub] + h[sub]RLmix[/sub] where h[sub]RLmix[/sub] is defined as the liquid departure enthalpy as predicted by any equation of state; and that h[sub]L,A[/sub] and h[sub]L,B[/sub] is basically (2) in this post; ie. the final equation that I am looking for is: (4) h[sub]Lmix[/sub] = x[sub]A[/sub] [H[sub]ref,A[/sub] + ∫Cp[sub]ig,A[/sub]dT (T[sub]ref[/sub] → T) + h[sub]RL,A[/sub]] + x[sub]L,B[/sub] [(H[sub]ref,B[/sub] + ∫Cp[sub]ig,B[/sub]dT (T[sub]ref[/sub] → T) + h[sub]RL,B[/sub]] + h[sub]RLmix[/sub] What I'm after is, if I am going for modelling non-ideal mixtures, I have to calculate the departure enthalpies of each component (to be added to the pure component enthalpies), then the departure enthalpy of the mixture itself (to be added to the final mixture equation ie. (3))? I am theorizing that the enthalpy departure of the mixture is independent of the enthalpy departure of a pure component at a certain T and P. Also, this holds true for vapors, yes? I'd like a straightforward answer, I am getting really confused from all these quantities. [/QUOTE]
Insert quotes…
Post reply
Forums
Engineering
Materials and Chemical Engineering
Departure enthelpy for mixture EOS = enthelpy of mixing?
Back
Top