Thermodynamics

=='"UNIQ--h-0--QINU"'Phase diagram of an ideal solution at fixed temperature== The following plot shows the vapor-liquid phase diagram for a binary ideal mixture (components: A and B). The vapor pressures of the pure substances are '"UNIQ--math-00000000-QINU"' and '"UNIQ--math-00000001-QINU"', respectively.

The blue curve shows the vapor pressure '"UNIQ--math-00000002-QINU"' of the mixture as a function of the mole fraction of A in the liquid '"UNIQ--math-00000003-QINU"':

[math]p=p_B^*+(p_A^*-p_B^*)x_A^l[/math]

The red curve shows the vapor pressure '"UNIQ--math-00000005-QINU"' of the mixture as a function of the mole fraction of A in the vapor '"UNIQ--math-00000006-QINU"':

[math]p=\dfrac{p_A^*p_B^*}{p_A^*-(p_A^*-p_B^*)x_A^v}[/math]

In the example below '"UNIQ--math-00000008-QINU"' (a.u.) and the value of '"UNIQ--math-00000009-QINU"' can be changed moving the slider below.

'"UNIQ--html-0000000A-QINU"'

The number of moles in each phase (liquid or vapor) can be obtained from the lever rule:

[math]n^l\overline{\text{BK}}=n^v\overline{\text{KR}}[/math]

'"UNIQ--html-0000000C-QINU"'

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