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| number of degrees of freedom | ||||
| number of mixture components | ||||
| number of phases |
Pure substance
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For Pure substance :
and LaTeX Math Inline body C=1
.LaTeX Math Inline body F = 3 - P
It means that 3-phase equilibrium (solid, liquid an gas) has zero degrees of freedom :
thus making a single point on Phase Equilibrium Diagram (called triple point )can only exist at fixed , called Triple Point and charcaterized by a certain Temperature and Pressure, called Triple Point. LaTeX Math Inline body F = 0
The 2-phase equilibrium has one degree of freedom:
and form a smooth line on Phase Equilibrium Diagram.LaTeX Math Inline body F=1
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[ State of matter ][ Pure substance ] [ MixturesMixture ][ Fluid MixturesMixture ]
[ Thermodynamic equilibrium ][ Vapour Liquid Equilibrium (VLE) ]
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