Elements of Thermodynamics

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1 st law dU = dQ + dW = TdS - PdV Internal energy = heat + mechanical work Internal energy is the most physically understandable expressed with the variables entropy and volume. They are not the most convenient in general à other potentials H, F and G by Legendre transform
Energy can be expressed using various potentials according to which conjugate quantities are chosen to describe the system. Internal energy Enthalpie Helmholtz free energy Gibbs free energy U H=U+PV F=U-TS G=H-TS
Page 1 and 2: Elements of Thermodynamics Indispen
Page 3 and 4: We distinguish extensive (size depe
Page 5 and 6: Consider a system of n extensive qu
Page 7 and 8: Conjugate quantities are related by
Page 9: Thermodynamic potentials The energy
Page 13 and 14: These expressions allow us to defin
Page 15 and 16: dU = TdS − PdV # dU = % ∂U $
Page 17: ⎟⎟ ⎠⎠ ⎞⎞ ⎜⎜ ⎝⎝
Page 20 and 21: In general, the heterogeneity depen
Page 22 and 23: In general, of course, rocks are no
Page 24 and 25: (b) Deformation is parallel to laye

Elements of Thermodynamics

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