Physics Mnemonics
To remember thermodynamic derivative definitions and Maxwell relations, use the thermodynamic square: Good Physicists Have Studied Under Very Fine Teachers (G = Gibbs free energy, P = pressure, H = enthalpy, S = entropy, U = internal energy, V = volume, F = Helmholtz free energy, T = temperature)
If we want to know what dG is defined as, we take the two opposite corners as the coefficients, and the diagonal corners as the differential terms. so dG = -SdT+VdP (neglecting chemical potentials). Thus, we also know that dG/dT = -S (at constant pressure), and dG/dP = V (at constant temperature).
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