Total Pressure using Raoult's Law in VLE Calculator

Total Pressure Formula:

\[ P_T = \frac{x_{liquid} \times P_{sat}}{y_{gas}} \]

Total Pressure (P_T):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Total Pressure using Raoult's Law in VLE?

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.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P_T = \frac{x_{liquid} \times P_{sat}}{y_{gas}} \]

Where:

\( P_T \) — Total pressure of the system (Pascals)
\( x_{liquid} \) — Mole fraction of component in liquid phase (0-1)
\( P_{sat} \) — Saturated pressure of the component (Pascals)
\( y_{gas} \) — Mole fraction of component in vapor phase (0-1)

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.

3. Importance of Total Pressure Calculation

Details: Accurate pressure calculation is crucial for designing distillation columns, flash drums, and other separation processes in chemical engineering.

4. Using the Calculator

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.

5. Frequently Asked Questions (FAQ)

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.