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Below is one paragraphe from my thermo textbook:

Equilibrium for A^{i}but not for T (X^{i}_{A}= X^{i}_{B}but, for example : T_{A}> T_{B}). Thus, for U and S, we have a gap in relation to the equilibrium : U_{A}= U_{A}eq + [itex]\delta[/itex]U_{A},U_{B}= U_{B}eq + [itex]\delta[/itex]U_{B}

Ai is state variables such as V,l, ect. T is temperature.

I don't quite understand why there is not a second situation where Ai is the same but T is different? Why it's not mentioned here?

Thanks a lot.

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# Homework Help: At the vicinity of equilibrium (thermo)

Can you offer guidance or do you also need help?

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