
Concept explainers
Interpretation: A solution is made by mixing
Concept introduction: Vapor pressure or an equilibrium vapor pressure of a substance is a pressure exerted by the vapors in thermodynamic equilibrium with its condensed phase (like liquid or solid) at the given temperature in a closed system. It can be calculated as:

Answer to Problem 46E
The mole fraction of
Explanation of Solution
Mole fraction of each component in vapor can be calculated by taking the ratio of partial pressure of each component in vapor above the solution to the total vapor pressure of the solution.
For this, first calculate the total vapor pressure of the solution by using modified Raoult;s law;
Here,
We have a solution prepared from
Mole fraction
Mole fraction
Vapor pressures of the pure components are given as:
Now, substitute the values in equation (1) determine the total vapor pressure of the solution as
Now, the mole fraction of each component in vapor can be calculated by taking the ratio of partial pressure of the each component in vapor above the solution ( P ) to the total pressure of the solution
Hence, the mole fraction of
The mole fraction of
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Chapter 17 Solutions
Chemical Principles
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