PateToni
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 Apr 3 awarded Popular Question Mar 20 awarded Supporter Feb 11 comment What does third law of thermodynamics tell us? Thank you. Okay, the point of the assumption was that the zero point and the sign of the temperature just have only a absolute meaning. I think about the story that $\hat{S} = \alpha S + \alpha_0$ where you transform the one entropy $S$ to a new one $\hat{S}$ (and vice versa) with $\alpha = T/\hat{T}$. Feb 11 comment What does third law of thermodynamics tell us? This is great. Thank you. Feb 11 accepted What does third law of thermodynamics tell us? Feb 11 asked What does third law of thermodynamics tell us? Feb 10 awarded Analytical Feb 10 awarded Scholar Feb 10 accepted How to calculate the Gibbs free energy out of a given Entropy? Feb 10 comment How to calculate the Gibbs free energy out of a given Entropy? Aha. Okay. Now I got it. At the end I will get $G = 0$. That's what I thought I should get. I was kind of blind and didn't saw that I can put everything together. Feb 10 comment How to calculate the Gibbs free energy out of a given Entropy? Okay. You will get $T = \left(\frac{U}{V\alpha}\right)^{1/4}$. I already got this. I was interested to calculate the equation of state between internal energy $U$, temperature $T$ and volume $V$. You will get $U\left(T,V\right)=\alpha V T^4$. Feb 10 comment How to calculate the Gibbs free energy out of a given Entropy? What do you mean with there is no need for the change of the natural variables? Feb 9 awarded Student Feb 9 asked How to calculate the Gibbs free energy out of a given Entropy?