A minimum-boiling azeotrope boils al a temperature that is lower than either of

Question

A minimum-boiling azeotrope boils al a temperature that is lower than either of its components. Why? acetone (bp 56 degree C) and cyclohexane (bp 80 degree C) form a minimum boiling azeotrope (bp 53 degree C); the azcotropic mixture is 75% in acetonc (mole %). SKI-TCI 1 a distillation curve (volume on the x-axis and temperature on the y-axis) to show what you would expect to see should one distill 35 ml. of a 50:50 mixture of these liquids. Be as quantitatively accurate as possible (using graph paper).

Explanation / Answer

Minimum boiling point azeotropic mixture boils at the lower temperature than the two liquids as the vapour composition is same as mixture composition.

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