Saturated Pressure Formula:
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Definition: Saturated pressure is the pressure at which a given liquid and its vapor can coexist in equilibrium at a given temperature.
Purpose: This calculator helps determine the saturated pressure using Modified Raoult's Law for vapor-liquid equilibrium (VLE) calculations.
The calculator uses the formula:
Where:
Explanation: The formula accounts for non-ideal behavior in mixtures through the activity coefficient.
Details: Accurate saturated pressure calculations are essential for designing distillation columns, evaporators, and other separation processes.
Tips: Enter the mole fractions (0-1), total pressure, and activity coefficient (default 1.0 for ideal mixtures). All values must be > 0.
Q1: When should I use Modified Raoult's Law?
A: Use it for non-ideal mixtures where the activity coefficient differs significantly from 1.0.
Q2: What's a typical activity coefficient value?
A: For ideal mixtures, γ = 1.0. For non-ideal mixtures, it can range from 0.1 to 10 or more.
Q3: How do I find mole fractions?
A: Mole fractions can be determined through chemical analysis or equilibrium measurements.
Q4: What units should I use for pressure?
A: The calculator uses Pascals (Pa), but you can convert from other units before entering values.
Q5: Does this work for multicomponent systems?
A: This calculator is for binary systems. For multicomponent systems, additional calculations are needed.