Chemical Engineering Thermodynamics
Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates

Use of only one graph for all gases
Covering of wide range
Easier plotting
More accurate plotting

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Chemical Engineering Thermodynamics
Gibbs-Duhem equation

Finds no application in gas-liquid equilibria involved in distillation
Applies only to binary systems
None of these
States that n₁dμ₁ + n₂dμ₂ + ....njdμj = 0, for a system of definite composition at constant temperature and pressure

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