- #1
IngridR
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Homework Statement
Hi, i have a little problem with a demostration, I hope you can help me.
Homework Equations
this said that we have a system, a gas is containing in a recipe, there's no heat exchange neither work with the enviroment, only an expansion v to 2v, we have to find that
(dT/dv)u=-(T^2/Cv)(d/dT)(P/T)v
The Attempt at a Solution
I start with
dU=(dU/dT)vdT+(dU/dv)t dU=0
(dT/dv)u=-(dU/dv)(dT/dU)vdv
(dT/du)v=1/Cv
(dT/du)=-(1/cv)(T(dP/dT)-P)
I don't know how continue!