Chemical Engineering - Heat Transfer - Discussion

If we take the vapour pressure/temperature relation of a reference liquid, usually water and if we know two points on the vapour pressure-temperature curve of the solution that is being evaporated, the boiling points of the solution to be evaporated at various pressures can be read off from the diagram called a Duhring plot. The Duhring plot will give the boiling point of solutions of various concentrations by interpolation, and at various pressures by proceeding along a line of constant composition.

There is no need of duhring's plot to calculate the evaporation phenomenon. Evaporation occurs at any temperature. And it's a surface phenomenon. Where duhring's plot is the relationship between pure liquid boiling point and Mixture boiling point. Then what's the relationship between duhring's plot and evaporation.

Relation between boiling point of pure solvent and solution.