Callen begins by defining the "problem" thermodynamics seeks to solve: predicting the final equilibrium state of a system after internal constraints are removed. His approach is built upon four primary postulates:
) of the extensive parameters that is maximized at equilibrium for any isolated system. Thermodynamics and an Introduction to Thermosta...
There exists a function (entropy,
The entropy of any system vanishes as the temperature (defined as ) approaches zero. 2. From Postulates to Physical Parameters Callen begins by defining the "problem" thermodynamics seeks
Entropy is additive, continuous, differentiable, and monotonically increasing with energy ( called equilibrium states
There exist particular macroscopic states, called equilibrium states, characterized completely by internal energy ( ), volume ( ), and mole numbers ( Nkcap N sub k