gorica
  • gorica
Do you know where can I find how to get relations between heat capacities Cp and Cv for ideal and real gases? Or someone can write it here?
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
You can always start with Cv=3/2R for a monatomic particle and use Cp=Cv+R. Cv= 5/2R for Diatomic CV= 3R for Polyatomic R is a constant that you know right? Cheers :D
gorica
  • gorica
I have to show why is it Cp=Cv+nR for ideal gas and why it is what it is for real gas. I found this, and I am ok with ideal gas... but I am not really clear with real gas :/
anonymous
  • anonymous
OooOOooo, That complicates things then :( I'm not sure I can help you further, sorry Cheers :D

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gorica
  • gorica
thanks anyway :)
ghazi
  • ghazi
hope this will help you out , hold a sec
ghazi
  • ghazi
if you are not able to read it , let me know :)
1 Attachment
gorica
  • gorica
I think I found what I was looking for... via coefficient of volume expansion Thank you very much
ghazi
  • ghazi
\[h= u+PV\]\[dh=du+d(PV)\] \[dh=du+d(RT), dh=du+RdT\]\[\frac{ dh }{ dT }=\frac{ du }{ dT }+R\]\[C _{p}=C _{v}+R, C _{p}-C _{v}=R\] you can use this derivation too
ghazi
  • ghazi
and you are welcome :)
gorica
  • gorica
what is h?
ghazi
  • ghazi
h-- enthalpy u -- internal energy dh/dT -- Cp du/dT-- Cv
gorica
  • gorica
is Cp defines as dh/dT or we get it somehow because p=const?
gorica
  • gorica
*defined
ghazi
  • ghazi
yep, Cp is specific heat capacity at constant pressure, and change in enthalpy at with temperature is the same quantity , for ideal gas dh=CpdT and gamma = Cp/Cv
gorica
  • gorica
ok. I will read this all again and if I have more questions, I will write them tomorrow, ok? :) thank you again :)
ghazi
  • ghazi
sure :)
gorica
  • gorica
do you maybe have graphs of isotherms of Van der Waals gas and real isotherms and something about thermometer with thermocouple, I can't find it on internet?
ghazi
  • ghazi
http://bcs.whfreeman.com/chemicalprinciples3e/content/lgraphs/E3004.html
ghazi
  • ghazi
http://adf.ly/3336544/banner/http://www.adichemistry.com/physical/gaseous/deviation/van-der-waals-equation.html
gorica
  • gorica
:) thanks :)

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