Two of the Massieu functions are functions of the following state variables:

1.

2.

The Massieu functions are obtained by performing Legendre transformations of the state function entropy S (U, V) with respect to the state variables U and V. Use Legendre transformations to express the Massieu functionsandandin terms of the thermodynamical potentials F and G. Determine also the differentialsdJ

and dY

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(1₁²4) ₁