Total Pressure Formula:
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Definition: This calculator determines the total pressure of a gas component using the K-value expression from Modified Raoult's Law.
Purpose: It helps chemical engineers and researchers calculate component pressures in non-ideal vapor-liquid equilibrium systems.
The calculator uses the formula:
Where:
Explanation: The activity coefficient accounts for non-ideal behavior, while the K-value represents the distribution of components between phases.
Details: Accurate pressure calculations are crucial for designing distillation columns, vapor-liquid separators, and other chemical processes.
Tips: Enter the activity coefficient (γ), saturated pressure (Pa), and K-value. All values must be > 0.
Q1: What is the activity coefficient?
A: It's a factor that quantifies how a component deviates from ideal behavior in a mixture (γ=1 for ideal solutions).
Q2: How do I determine the K-value?
A: K-values are typically obtained from experimental data or thermodynamic models for specific systems.
Q3: When is Modified Raoult's Law needed?
A: When dealing with non-ideal liquid mixtures where activity coefficients significantly differ from 1.
Q4: What units should be used?
A: Consistent pressure units (Pa, kPa, atm) must be used for both saturated and total pressures.
Q5: Can this be used for multi-component systems?
A: This calculates pressure for one component. For mixtures, you would need to perform calculations for each component.