Raoult's Law (ΔP)Chemistry
Raoult's Law & Vapor Pressure Lowering (ΔP) Calculator
Calculate ideal solution vapor pressure, absolute vapor pressure depression (ΔP), and relative lowering from mole fractions and pure solvent vapor pressure.
Calculated Result
Solution Vapor Pressure
22.61pressure unit
Calculator Inputs
pressure
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-
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Solution Vapor Pressure
22.61pressure unit
Vapor Pressure Lowering (ΔP)
1.19 pressure unit
Relative Vapor Pressure Lowering (%)
5 %
Raoult's Law Verified: Solution vapor pressure decreases in direct proportion to the solute mole fraction.
Raoult's Law Vapor Pressure Comparison
Pure Solvent P°
23.8 -(51%)
Solution P
22.61 -(49%)
Standard physical chemistry and solution thermodynamics tool for ideal and dilute solutions.
Calculation Methodology
Raoult's Law: P_solution = X_solvent * P°_solvent. Vapor Pressure Lowering: ΔP = P°_solvent - P_solution = X_solute * P°_solvent. Relative Lowering: ΔP / P°_solvent = X_solute.
Frequently Asked Questions
Intermolecular forces between unlike molecules (A-B) are identical to those between like molecules (A-A and B-B), resulting in zero enthalpy of mixing (ΔH_mix = 0) and zero volume change (ΔV_mix = 0).
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