Pick out the system with minimum boiling azeotrope at 1 atm ?
Correct answer: C. Ethyl alcohol-water
- A. Benzene-toluene
- B. Hydrochloric acid-water
- C. Ethyl alcohol-water
- D. All A., B. and C.
Explanation
Ethanol and water form a minimum-boiling azeotrope at approximately atmospheric pressure because their vapour-liquid equilibrium shows positive deviation from Raoult's law. Benzene-toluene is nearly ideal, while hydrochloric acid-water forms a maximum-boiling azeotrope.
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