ΔTb = Kb × i × m — dissolving a solute raises a solvent's boiling point.
Adding salt to water raises its boiling point slightly (~0.5°C per mole/kg).
Van't Hoff factor i: 1 for covalent compounds, 2 for NaCl, 3 for CaCl₂.
Dissolved ions disrupt the water surface, requiring more energy (higher temperature) to vaporise.