FIRST DERIVATIVES IN THE THERMODYNAMICS OF MULTIPLE EQUILIBRIUM SYSTEMS IN TERMS OF RESPONSE REACTIONS

A large class of first partial derivatives involving the eight common thermodynamic variables (P, V, T, U, H, S, F, G) in systems with multi ple chemical equilibria is known to be decomposable into two component s, referred to as ''non-chemical'' and ''chemical''. We examine the ch emical component and its dependence on the various equilibria occurrin g in the system considered. It is shown that the chemical component ma y be expressed in terms of response reactions which were previously in troduced in the study of sensitivity coefficients in equilibria achiev ed under T, P = const. Details of our analysis are given for only one partial derivative, namely for the Joule-Thomson coefficient, pertaini ng to chemical equilibria under adiabatic conditions H, P = const.