A generalized solution method for the quasi‐chemical local composition equations

The work of Abusleme and Vera based on the Quasi‐Chemical Theory of Guggenheim in terms of groups is extended to multicomponent multigroup mixtures. The nonlinear equations arising from the theory are rearranged in a particular way that allows them to be solved using a generalized Newton‐Raphson method. Initial estimates of the values of the non‐random factors are obtained with a Taylor expansion around the random values. No more than five iterations are required for typical systems. Practical applications of the method are presented for ternary group systems.