Thermokinetics is the general kinetic theory of physico-chemical pheno
mena. Although its basic conception is very old, the thermodynamic the
ory has been developed only in the last two decades. The scope of Ther
mokinetics extends to equilibria (dynamics of equilibria), to near-equ
ilibrium (Onsagerian Irreversible Thermodynamics) and far from equilib
rium processes (chemical reactions). The kinetic treatment results in
new interpretations for old concepts, such as rate coefficients, symme
try relations, cross effects, etc. It uses the concept ''charge'' borr
owed from other branches of physics and introduces a new (fourth) fund
amental quantity, the Entropy Dissipation Function (D-S). It is shown
here that the second differentials of D-S play important thermodynamic
and technical roles. One of them is the well known quantity, the Entr
opy Production.