Notes on Phase Rule
Notes on Phase Rule Introduction: Phase rule is an important generalisation or tool which helps us to predict the condition that must be specified for a system to exhibit equilibrium. Most importantly by the application of this rule it is possible to predict quantitatively the effect of changing pressure, temperature or concentration on a heterogeneous system at equilibrium by means of a diagram called the phase diagram. By about 1874, G.W Gibbs formulated this rule which is F = C-P +2 or F+P = C+2 , where F = number of degrees of freedom, C= Number of components and P = number of phases. Thus phase rule states that the sum total of the number of degrees of freedom and the number of phases exceeds the number of componets by two. 1.Phase: A phase is defined as any homogeneous and physically distinct p...