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Sir (du)p=du(due to temperature change)+F(v) where f(v) is change in u due to change in volume
dup=ncvdt+f(v), ncpdt- nrdt =ncvdt+f(v)
so cp-cv=R+f(v)/ndt From this i am not getting cp-cv=R for real gas.Please tell where i am wrong or is it that cp-cv is not equal to R for real gases

ANKIT KUMAR , 10 Years ago
Grade 12th pass
anser 1 Answers
Naveen Kumar

Last Activity: 10 Years ago

H= U+PV.............
dh=du+d(PV)........
(Here we are putting PV=nRT which is ideal gas equation and not true for real gases in general)
dh=du+d(RT)..........
dh=du+RdT.;........
frac{ dh }{ dT }=frac{ du }{ dT }+R
C p=C v+R..........
C p-Cv=R
.....................................................................................................

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