Chemical Engineering Thermodynamics
Absolute zero temperature signifies the

Minimum temperature attainable
Temperature of the heat reservoir to which a Carnot engine rejects all the heat that is taken in
Temperature of the heat reservoir to which a Carnot engine rejects no heat
None of these

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Chemical Engineering Thermodynamics
Gibbs-Duhem equation

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

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