In practice, however, the coexistence of more phases than allowed by the phase rule normally means that the phases are not all in true equilibrium.
12.
The amendment was first used in 1980 with the intention of applying to housing association rents the new phasing rules then introduced for private sector tenancies.
13.
A multi-state system may complicate or simplify the problem because the Gibbs phase rule predicts that intensive quantities will no longer be completely independent from each other.
14.
Liquid vapour phase diagrams for other systems may have azeotropes ( maxima or minima ) in the composition curves, but the application of the phase rule is unchanged.
15.
Calculating the number of components in a system is necessary, for example, when applying Gibbs'phase rule in determination of the number of degrees of freedom of a system.
16.
There may however be connections between them : for example, Gibbs'phase rule is involved with phase transitions at which JimR 01 : 12, 17 September 2005 ( UTC)
17.
If four phases of a pure substance were in equilibrium ( ), the phase rule would give, which is meaningless, since there cannot be " 1 independent variables.
18.
The understanding gained there led to the publication in 1924 of " The Phase Rule and the Study of Heterogeneous Equilibria ", and to an appreciation of the value of fundamental research for industrial applications.
19.
Combining expressions for the Gibbs Duhem equation in each phase and assuming systematic equilibrium ( i . e . that the temperature and pressure is constant throughout the system ), we recover the Gibbs'phase rule.
20.
Each point within the triangle represents a possible composition of a mixture of the three components or pseudo-components, which may consist ( ideally, according to the Gibbs'phase rule ) of one, two or three phases.
