Which of the following statements is false?
A. A binary mixture that exhibits vapor-liquid-liquid equilibrium has one degree of freedom, according to the Gibbs phase rule
B. The composition where there is vapor-liquid-liquid equilibrium for a binary mixture is known as the eutectic composition.
C. In heterogenousazeotropy, a binary mixture has a miscibility gap that bounds the azeotrope for the system.
D. For immiscible liquid mixtures, the pressure at which vapor-liquid-liquid equilibrium occurs is just the sum of the pure component vapor pressures at that temperature.
E. None of the above are false.
A. Incorrect. This is true. F = C - ? + 2. Since there are two components (C = 2) and three phases (? = 3) we find F = 1. Once we set one variable (e.g. temperature), we cannot independently specify the other intensive variables.
B. Correct. This is false. The eutectic point and eutectic composition relate solely to solid-solid-liquid equilibrium.
C. Incorrect. This is true and is the definition of heterogenousazeotropy.
D. Incorrect. This is true. For immiscible liquid systems, the system pressure for VLLE is just the sum of the vapor pressures of the pure components.
E. Incorrect. One is false; review the statements again.
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