APPLIED THERMODYNAMICS
87
The curves AB, BC, and A'B' are the vapor pressure curves of solid solvent (ice) liquid water and o
solution containing non volatile solute respectively. T K is the freezing point of pure solvent T 1K is the freezing point of the solution. The freezing point depression depends upon the molal concentration of the solute and does not depend upon the nature of solute. Therefore it is a colligative property.
denominator as compared to W A/MA. Therefore,
If W A is the mass of solvent in kg then nB/WA is the molality of the solution.
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