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Solved: The vapor pressure of ethanol (C2H5OH) at 20°C is
Chapter 12, Problem 53P(choose chapter or problem)
The vapor pressure of ethanol (\(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\)) at 20°C is 44 mmHg, and the vapor pressure of methanol (\(\mathrm{CH}_{3} \mathrm{OH}\)) at the same temperature is 94 mmHg. A mixture of 30.0 g of methanol and 45.0 g of ethanol is prepared (and can be assumed to behave as an ideal solution).
(a) Calculate the vapor pressure of methanol and ethanol above this solution at 20°C.
(b) Calculate the mole fraction of methanol and ethanol in the vapor above this solution at 20°C.
(c) Suggest a method for separating the two components of the solution.
Questions & Answers
QUESTION:
The vapor pressure of ethanol (\(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\)) at 20°C is 44 mmHg, and the vapor pressure of methanol (\(\mathrm{CH}_{3} \mathrm{OH}\)) at the same temperature is 94 mmHg. A mixture of 30.0 g of methanol and 45.0 g of ethanol is prepared (and can be assumed to behave as an ideal solution).
(a) Calculate the vapor pressure of methanol and ethanol above this solution at 20°C.
(b) Calculate the mole fraction of methanol and ethanol in the vapor above this solution at 20°C.
(c) Suggest a method for separating the two components of the solution.
ANSWER:Step 1 of 7
Given data:
*The temperature is 
*The vapour pressure of ethanol is 44 mmHg.
*The vapour pressure of methanol is 94 mmHg.
*The mass of methanol is 30.0 g.
*The mass of ethanol is 45.0 g.