Chemical Engineering Thermodynamics
Compound having large heat of formation is

Less stable
Either more or less stable ; depends on the compound
More stable
Not at all stable (like nascent O₂)

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Chemical Engineering Thermodynamics
Gibbs-Duhem equation

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

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