PHASE RULE AND COMMON TERMS IN PHASE EQUILIBRIUM Flashcards
state the phase rule
F = C – P + 2 where F is the degree of freedom, C is the component and P is the phase
the phase rule equation was given by __________
Josiah William Gibbs
what is a bivariant system?
It is a system where the degree of freedom is 2.
what is a monovariant system?
It is a system where the degree of freedom is 1
What is a invariant system?
It is a system where the degree of freedom is 0.
Maximum of _______ phases can exist in equilibrium.
three
define phase.
It is a part of the system which is physically and chemically homogenized ad separated from rest of the system by a discrete boundary.
State the rules for determining the number of phases.
Pure substance present in one state of matter constitutes one phase.
* Same substance present in different states of matter : different
phases.
* A mixture of gases : one phase system.
* A homogeneous solution : one phase system.
* For immiscible liquids, the number of layers :equal to the number of
phases
* For solids, each chemical species is a different phase
Different allotropic
forms of the same substance constitute different phases
define component
It is a chemically distinct quantity present in the system
Define degree of freedom
It is the minimum number of variables required to describe each compoent in each phase of the system.
