Question

If a solution shows positive deviations from Raoult’s law, would you expect it to have a higher or lower boiling point than if it were ideal? Explain.

Short answer

If a solution shows positive deviation from Raoult’s law, then the solution is said to have weak interactions between solute – solute and solvent – solvent molecules. This increases the tendency of molecules to escape which the vapor pressure, therefore boiling point tend to decrease then if it were idle.

Step-by-step solution

Positive deviation from Raoult’s law:

If a solution shows positive deviation from Raoult’s law, then the solution is said to have weak interactions between solute – solute and solvent – solvent molecules.This increases the tendency of molecules to escape which the vapor pressure, therefore boiling point tend to decrease then if it were idle.