# Maxwell Relations

Maxwell Relations are commonly known as a set of four partial differential equations between four thermodynamic quantities or potentials: pressure (P), volume (V), temperature (T), and entropy (S). So for example the expression (∂T/∂V) |S  means the partial derivative of T with respect to V while keeping S constant.

• (∂T/∂V) |S = -(∂P/∂S) |V
• (∂P/∂T) |V = (∂S/∂V) |T
• -(∂S/∂P) |T = (∂V/∂T) |P
• (∂V/∂S) |P = (∂T/∂P) |S

In my diagram above, the expressions that are equal are on either side of the common leg of adjacent isosceles right triangles.

https://en.wikipedia.org/wiki/Maxwell_relations

https://johncarlosbaez.wordpress.com/2021/09/17/maxwells-relations-part-1/

https://johncarlosbaez.wordpress.com/2021/09/18/maxwells-relations-part-two/

https://johncarlosbaez.wordpress.com/2021/09/22/maxwells-relations-part-3/

https://en.wikipedia.org/wiki/Thermodynamic_potential

Thermodynamics and the Four Thermodynamic Potentials

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