(a) Calculate the vapor pressure at 45°C for a solution that contains 46.0% of propanol and 54.0% water, by mole, assuming an ideal solution. (b) Determine whether water and propanol form an ideal solution, non-ideal solution with positive deviation, or non-ideal solution with negative deviation. (c) Are the overall intermolecular forces in the mixture stronger or weaker than those in pure liquid combined? Explain. (d) Which liquid has a higher boiling point, water or propanol? Explain. (e) For the three mixtures shown in the table, which one is expected to have the lowest boiling point? Explain.

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The vapor pressure of several solutions of water-propanol (C;H;OH) were determined at various
compositions, and the following data of vapor pressure were collected at 45°C.
6.
Mole fraction of H;0
XH20.
Vapor Pressure of Solution
(torr)
74.0
0.37
80.2
0.54
81.6
0.69
80.6
1.00
72.0
(a) Calculate the vapor pressure at 45°C for a solution that contains 46.0% of propanol and 54.0%
water, by mole, assuming an ideal solution.
(b) Determine whether water and propanol form an ideal solution, non-ideal solution with positive
deviation, or non-ideal solution with negative deviation.
(c) Are the overall intermolecular forces in the mixture stronger or weaker than those in pure liquids
combined? Explain.
(d) Which liquid has a higher boiling point, water or propanol? Explain.
(e) For the three mixtures shown in the table, which one is expected to have the lowest boiling
point? Explain.
Transcribed Image Text:The vapor pressure of several solutions of water-propanol (C;H;OH) were determined at various compositions, and the following data of vapor pressure were collected at 45°C. 6. Mole fraction of H;0 XH20. Vapor Pressure of Solution (torr) 74.0 0.37 80.2 0.54 81.6 0.69 80.6 1.00 72.0 (a) Calculate the vapor pressure at 45°C for a solution that contains 46.0% of propanol and 54.0% water, by mole, assuming an ideal solution. (b) Determine whether water and propanol form an ideal solution, non-ideal solution with positive deviation, or non-ideal solution with negative deviation. (c) Are the overall intermolecular forces in the mixture stronger or weaker than those in pure liquids combined? Explain. (d) Which liquid has a higher boiling point, water or propanol? Explain. (e) For the three mixtures shown in the table, which one is expected to have the lowest boiling point? Explain.
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