Heat Energy, Entropy and The Second Law: A New Perspective in   Thermodynamics
  We present a new state function to define the energy of thermal motion, it is the last one of the undefined forms of the internal energy, combine with the mechanical free energy and Gibbs free energy, we rewrite the equations of the first law, this implies a new advance: we can describe the state changes of the internal energy directly. In a new theoretical structure, we define the concept of the heat partial pressure, rewrite the definition of the entropy, we discuss in detail on the three sources of irreversibility, the compensation mechanism of the heat conversion, and the internal causal principle of the second law, an interesting conclusion shows that the second law itself has already contained the mechanism of evolution. 
Tang Suye
physics.chem-ph cond-mat.stat-mech physics.class-ph