Raoult's Law
| Formula / Notation | P_A = x_A × P°_A |
|---|---|
| Also Known As | Raoult's vapor pressure law, ideal solution law, partial pressure law |
What is Raoult's Law?
Raoult's Law states that the partial vapor pressure of a component in an ideal solution is equal to the mole fraction of that component multiplied by its pure vapor pressure at the same temperature. It applies to ideal solutions where intermolecular interactions between different molecules are the same as between like molecules. Deviations from Raoult's Law indicate non-ideal behavior.
Formula & Notation
Other Names / Synonyms: Raoult's vapor pressure law, ideal solution law, partial pressure law
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Raoult's Law states that the partial vapor pressure of a component in an ideal solution is equal to the mole fraction of that component multiplied by its pure vapor pressure at the same temperature. It applies to ideal solutions where intermolecular interactions between different molecules are the same as between like molecules. Deviations from Raoult's Law indicate non-ideal behavior.
Distillation column design (vapor-liquid equilibrium). Predicting boiling point elevation (colligative property). Understanding azeotropes. Solvent selection for extractions. Vapor pressure calculations in chemical engineering. Understanding volatile solvent mixtures.
Theoretical law — no direct safety concerns. Practical applications involve volatile solvents with associated fire/toxicity hazards.
The formula or notation for Raoult's Law is: P_A = x_A × P°_A