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The vapor in equilibrium with a pentane-hexane solution at 25°C has a mole fraction of pentane equal to 0.15 at 25°C. What is the mole fraction of pentane in the solution? (See Exercise 57 for the vapor pressures of the pure liquids.)
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Chemistry: An Atoms First Approach
2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
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BuyFindarrow_forward
Chemistry: An Atoms First Approach
2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 10, Problem 123CP
Textbook Problem
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The vapor in equilibrium with a pentane-hexane solution at 25°C has a mole fraction of pentane equal to 0.15 at 25°C. What is the mole fraction of pentane in the solution? (See Exercise 57 for the vapor pressures of the pure liquids.)
Interpretation Introduction
Interpretation: The mole fraction of Pentane in solution has to be calculated.
Concept Introduction: Raoult’s law for ideal solution states that the mole fraction of the solvent is directly proportional to the vapor pressure of an ideal solution. Raoult’s law can be expressed by the equation,
Where,
Explanation of Solution
Record the given info
Vapor in equilibrium =
Mole fraction of Pentane =
To mole fraction of Pentane in solution
Vapor pressure of Pentane=
Vapor pressure Hexane =
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Chemistry: An Atoms First Approach
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