Wilson Equation Formula:
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Definition: The activity coefficient (γ) quantifies the deviation of a component's behavior from ideal solution behavior in liquid mixtures.
Purpose: The Wilson equation provides a thermodynamic model for calculating activity coefficients in non-ideal binary liquid mixtures.
The calculator uses the Wilson equation:
Where:
Explanation: The equation accounts for molecular interactions between different components in the mixture.
Details: Accurate activity coefficients are essential for vapor-liquid equilibrium calculations, distillation design, and chemical process simulations.
Tips: Enter mole fractions (must sum to 1) and Wilson coefficients (typically determined experimentally or from correlations).
Q1: What do Wilson coefficients represent?
A: They represent the energy interactions between different molecular pairs in the mixture.
Q2: What range of values do activity coefficients typically have?
A: For most systems, γ ranges between 0.1 and 10, though extreme values are possible.
Q3: When is the Wilson equation most appropriate?
A: For completely miscible liquid mixtures, especially those with similar molecular sizes.
Q4: How do I obtain Wilson coefficients?
A: They are typically determined by fitting experimental vapor-liquid equilibrium data.
Q5: Can this be used for multicomponent systems?
A: The Wilson equation can be extended to multicomponent systems, but this calculator handles binary mixtures only.