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Understanding Boiling Point Elevation
Formula
Boiling point elevation is a colligative property — it depends on the number of solute particles, not their identity. When a non-volatile solute is dissolved in a solvent, the boiling point of the solution is higher than that of the pure solvent.
The formula ΔTb = i × Kb × m relates the change in boiling point to the van't Hoff factor (i), the ebullioscopic constant (Kb), and the molality (m). For water, Kb = 0.512 °C·kg/mol.
Common use cases:
- Determining molar mass of unknown solutes
- Cooking at altitude
- Antifreeze formulation
Frequently Asked Questions
Dr. David Park
Applied Mathematician, PhD Mathematics
David holds a PhD in Applied Mathematics from MIT. He has published research on numerical methods and computational algorithms used in engineering and scientific calculators.
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