The number of degree of freedom for an Azeotropic mixture of ethanol and water in vapourliquid equilibrium, is__________________?
Correct answer: B. 1
- A. 3
- B. 1
- C. 2
- D. 0
Explanation
For a binary vapour-liquid system, the usual phase rule gives two degrees of freedom, but the azeotropic condition adds one restriction because vapour and liquid compositions coincide. The remaining degrees of freedom are therefore one.
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