1. What is Liquid Phase Mole Fraction using Henry Law?

Definition: This calculator determines the mole fraction of a component in the liquid phase based on its vapor phase mole fraction, total pressure, and Henry's Law constant.

Purpose: It's used in vapor-liquid equilibrium (VLE) calculations for dilute solutions where Henry's Law applies.

2. How Does the Calculator Work?

The calculator uses Henry's Law formula:

Where:

• \( x_{liquid} \) — Mole fraction in liquid phase
• \( y_{gas} \) — Mole fraction in vapor phase (0 to 1)
• \( P_T \) — Total gas pressure (Pascals)
• \( K_H \) — Henry's Law constant (Pa·m³/mol)

Explanation: The vapor phase mole fraction multiplied by total pressure gives the partial pressure, which when divided by Henry's constant gives the liquid phase mole fraction.

3. Importance of Henry's Law Calculation

Details: This calculation is crucial for designing separation processes, understanding gas solubility, and predicting phase behavior in chemical engineering applications.

4. Using the Calculator

Tips: Enter the vapor phase mole fraction (0-1), total pressure in Pascals, and Henry's Law constant. Default values are provided for common conditions.

5. Frequently Asked Questions (FAQ)

Q1: When does Henry's Law apply?
A: Henry's Law applies to dilute solutions where the solute concentration is low (typically x_liquid < 0.01).

Q2: What are typical units for Henry's constant?
A: Common units are Pa·m³/mol, atm·m³/mol, or bar·m³/mol. Ensure units match your pressure units.

Q3: How do I find Henry's constant for a specific gas?
A: Henry's constants are tabulated in chemical engineering handbooks and vary with temperature.

Q4: What if my vapor mole fraction is 0?
A: Then the liquid mole fraction will also be 0 (no component present).

Q5: Does temperature affect this calculation?
A: Yes, but indirectly through Henry's constant which is temperature-dependent.