Phase Rule

Name:
Phase Rule
Detailed information:
Propounded by J. Willard Gibbs in 1877, the phase rule is a general system of equations of the form F = C −P + 2 stating the boundaries of thermodynamic equilibrium in a system of chemical reactants. The number of degrees of freedom (F) allowed in a given heterogeneous system may be examined by analysis or observation and plotted on a graph by proper choice of the components (C), the phases (P), and the independently variable factors of temperature and pressure. The principles of the phase rule apply to all multicomponent systems, including solvent blends, glass, alloys, and plastics.