Here are shown the four most common equation-of-state forms for a pure material. Each is obtained formally through partial differentiation of its "parent function."

Equation of State		Parent Form
PVT Description Large view Description Large view		AVT Description Large view

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Equation of State		Parent Form
TSP Description Large view		HSP Description Large view

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Equation of State		Parent Form
T(S/V)µ Description Large view		U´(S/V)µ Description Large view