Physical · Phase Equilibria
The Phase Rule & Phase Equilibria
Exam-focused revision notes on The Phase Rule & Phase Equilibria for CSIR-NET Chemical Sciences, GATE Chemistry and IIT-JAM — the core concepts, the formulas worth memorising, the traps that cost marks, and a quick-recall table.
The Gibbs phase rule
F = C − P + 2 relates the degrees of freedom to the number of components and phases. For a one-component system it reduces to F = 3 − P.
What this note covers
- 1The Gibbs phase rule
- 2One-component system: the water phase diagram
- 3The Clausius–Clapeyron equation
- 4Two-component system: simple eutectic diagram
- 5Reduced (condensed) phase rule
- 6Common traps students miss
- 730-second recall table
Read the full note
The remaining 6 sections — including the worked examples, the common-traps list and the quick-recall table — are part of ChemVidya Full Access, along with 6,000+ practice questions.
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