# Maxwell's relation Thermodynamics

1. Oct 22, 2013

### hasibme2k

How can I prove the following relation
T(∂p/∂T)v,N +(∂T/∂V)u,N =p(∂T/∂U)v,N

where p= pressure, V= volume, U=internal energy, T= Temperature. I tried by fundamental relation and Maxwell's relation but couldn't able to prove it.

I would appreciate if anybody helps me out.

Last edited: Oct 22, 2013
2. Oct 22, 2013

### UltrafastPED

Are those partial derivatives? If so use "advanced" so we can be sure. Is t the same as T?

3. Oct 22, 2013

### vanhees71

...and you also need to tell which variables are kept constant when taking the partial derivatives like in, e.g.,
$$C_V=\left (\frac{\partial U}{\partial T} \right )_{V,N}$$
to define the specific heat at constant volume.

4. Oct 22, 2013

### dextercioby

That's the trick with thermodynamics. Partial derivatives always come from maths with something extra: which variables specifically you are keeping constant when calculating the limits of a multivariable function.

5. Oct 22, 2013

### Philip Wood

I think the relationship is wrong. The dimensions of the first term are those of pressure, but the dimensions of the other two terms are those of temperature divided by volume.

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