Raoult's Law - Two Volatile Components
ΔTf = kf × m × n
This page presents problems involving the vapor pressures of mixtures
containing two volatile components. When you press "New Problem",
a question will appear to the right of the table. In the question,"Po" is
the vapor pressure of the pure material, "P" represents the
partial pressure of a component and "X" is a mole fraction.
Since there are two mole fractions (liq and vap) possible, these are
differentiated by use of the subscripts "liq" and "vap".
Thus, the following
acetone: P = 76 torr
diethylether: Xvap = 0.345
means that the partial pressure of the acetone for the solution being discussed
is 76 torr and the mole fraction of the diethylether in the vapor is
0.345. Further, in the structuring of the presenting the answer, we use the convention
that the first compound mentioned is denoted with the subscript "a" and
the second with the subscript "b". Determine the value of the answer,
enter it in the cell and press "Check Answer", results appear immediately
in the table. For purposes of this exercise, assume that all solutions are ideal.
Some of the calculations are fairly complex, so care should be exercised.
- To begin, click "New Problem" and a question will appear to the right of the button.
- IMPORTANT: Put the correct value into the answer cell and click "Check Answer."
- The results on the problem and a running total will appear in the second table.
- Pressing the "Show Answer" will display the solution and you will no longer be able to submit an answer for that problem.
