The lowering of the three‐phase equilibrium temperature in a binary system upon addition of a third component

Abstract

AbstractIn a binary system A‐B, wherein a solid compound ABn occurs beside a liquid phase consisting mainly of B and a gaseous phase consisting mainly of A, the three‐phase equilibrium temperature and pressure are interdependent. At a given pressure the addition of a third component C causes a lowering of the equilibrium temperature, already discussed in a previous article on gas hydrates1 and for which the general equation (VI) is now derived. Under specified conditions this equation may be simplified. The calculation of the standard heat of formation ΔH° to be used in this general equation is given in another previous paper 2. When the compound is formed from two immiscible liquid layers, instead of from a gaseous phase and a liquid one, similar considerations are valid.