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corr0105

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**Thermodynamics! Finding a fundamental equation.**

This is the question:

"While he Gibbs free energy G is the fundamental function of the atral variables (T,p,N), (T=temperature, p=pressure, N=number of molecules), growing biological cells often regulte not the numbers of molecules N, but the chemical potentials μ. That is, they control

*concentrations*. What is the fundamental function Z of natural variables (T,p,μ)?

I know a few equations that deal with Gibbs free energy:

G=H-TS

G=[tex]\sum[/tex]μN

Basically, I have no idea where to start with this problem. If anyone can give me a push in the right direction that would be much appreciated!