Question

Prove that elevation in boiling point is a colligative property?

Answer 1

You can take two different substance to be dissolved in benzene and ...when you dissolve something in a pure liquid ...the solute particles take place of some molecules on the surface ...as a result of which the vapour pressure of pure liquid decreases ...since boiling point is the temperature at which vapour pressure of any liquid becomes equal to that of atmosphere ...since less molecules will leave the surface coz of solute dissolution ...it will take more temperature to get to that pressure ..and this will happen no matter which solute you take be it glucose or sugar ..both will do same elevation if taken in same concentration

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