Question

when we can use fractional distillation ? (in terms of temperature difference)

Answer 1

Answer:

Fractional distillation is the separation of a mixture into its component parts, or fractions. Chemical compounds are separated by heating them to a temperature at which one or more fractions of the mixture will vaporize. It uses distillation to fractionate. Generally the component parts have boiling points that differ by less than 25 °C (45 °F) from each other under a pressure of one atmosphere. If the difference in boiling points is greater than 25 °C, a simple distillation is typically used.

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Answer 2

Explanation:

When the boiling points if the two liquids in the mixture are close, generally a difference of less than 40°Celsius (104°Fahrenheit) , fractional distillation is more efficient.