What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope ?
Correct answer: C. 1
- A. 0
- B. 2
- C. 1
- D. 3
Explanation
A binary vapour-liquid system ordinarily has two degrees of freedom under the phase rule, but the azeotropic condition imposes one additional constraint. Therefore, the azeotropic system has one degree of freedom.
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