  We consider Gibbs' definition of chemical equilibrium and connect it with
dynamic equilibrium, in terms of no substance formed. We determine the activity
coefficient as a function of temperature and pressure, in reactions with or
without interaction of a solvent, incorporating the error terms from Raoult's
Law and Henry's Law, if necessary. We compute the maximal reaction paths and
apply the results to electrochemistry, using the Nernst equation.
