Total Pressure Formula:
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Definition: This calculator determines the total pressure in a vapor-liquid equilibrium (VLE) system using Raoult's Law, based on mole fractions and saturated pressure.
Purpose: It helps chemical engineers and chemists analyze phase equilibrium in binary or multicomponent systems.
The calculator uses the formula:
Where:
Explanation: The formula relates the partial pressure of a component in the gas phase to its mole fraction in the liquid phase and its pure component vapor pressure.
Details: Accurate pressure calculation is crucial for designing distillation columns, flash drums, and other separation processes in chemical engineering.
Tips: Enter the mole fraction in liquid phase (0-1), saturated pressure in Pascals, and mole fraction in vapor phase (0-1). All values must be within their specified ranges.
Q1: What is Raoult's Law?
A: Raoult's Law states that the partial pressure of a component in the vapor phase is equal to the product of its mole fraction in the liquid phase and its vapor pressure in the pure state.
Q2: When is Raoult's Law applicable?
A: Raoult's Law works best for ideal solutions where intermolecular forces between different molecules are similar to those between like molecules.
Q3: What if my system is non-ideal?
A: For non-ideal systems, you would need to use modified Raoult's Law with activity coefficients or other equations of state.
Q4: How do I find saturated pressure?
A: Saturated pressure can be found in chemical engineering handbooks or calculated using Antoine equation if you know the temperature.
Q5: Can this be used for multicomponent systems?
A: This calculator is for one component. For multicomponent systems, you would sum the partial pressures of all components.