Recent content by ed321

Thanks for the reply. I thought \frac{S}{V} = \left( \frac{\partial p}{\partial T}\right)_s followed straight away from 0 = V dp - SdT by "dividing" by dT at constant s. Maybe this step isn't valid since you can't always treat dT like a ordinary number, but I can't see any reason this would...

Would this be more appropriate somewhere else?

Homework Statement I’m struggling to reconcile two results about the behaviour of a photon gas, any help would be appreciated: First of all the Gibbs free energy=0, which means that dG=0=Vdp-SdT But also p=1/3 U/V and S=4/3 U/T which means p=1/4 ST/V. Now if we call the entropy per unit...