The degrees of freedom are the concentration of 2 components. The components are calculated by mole fraction or in weight percent. In this experiment, weight percent was used. In a three component system, an equilateral triangle is used to represent the composition of the three component system at constant temperature and pressure. Figure one shows a graphical representations of a three-component system at constant pressure.
Triangle represent an equilateral triangle.
Here are some characteristics which are used in using a three-component system as shown in figure 1. 1. Each apex represent a pure component. Each point on a side of the triangle represents a unique binary mixture. Each point within the triangle represents a unique ternary mixture. A straight line parallel to one of the sides represents variation of the relative amounts of two components while the fractional amount of the third component remains constant.