# Homework Help: Help me to solve the equation from Thermodynamics!

1. Sep 23, 2014

Someone can help me to prove the question below plz!

someone know how to derive this equation Cp-Cv=T(dP/dT)v*(dV/dT)p*?

Last edited: Sep 23, 2014
2. Sep 23, 2014

### mal4mac

You need to say what all those variables represent, and what equation(s) you have from which you wish to derive this one. What is the actual full question you are trying to answer?

3. Sep 23, 2014

### Staff: Mentor

This sounds like a homework problem. Is it?

4. Sep 23, 2014

That is the problem. My lecturer asked me to derive the equation given without any details.

5. Sep 23, 2014

More like it but it is an assignment for us. My lecturer just gave us that equation and asked to derive the equation without any details.

6. Sep 23, 2014

7. Sep 23, 2014

*UPDATE*

The question are asking how to prove the left equation equal to the right equation

8. Sep 23, 2014

### Staff: Mentor

What is dU in terms of dS and dV? If we represent the entropy S as S(T,P), what is dS in terms of the partial derivatives of S with respect to T , P, and dT and dP?

Chet