Question

How to calculate number of components in phase rule?

Answer 1

For a system at equilibrium the phase rule relates:

P = number of phases that can coexist, to

C = number of components making up the phases, and

F = degrees of freedom.

Where these three variables are related in the equation

P + F = C + 2

The degrees of freedom represent the environmental conditions which can be independantly varied without changing the number of phases in the system. Conditions include:

Temperature,

Pressure,

Chemical Composition,

pH,

Eh,

Oxygen Fugacity.

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