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Molar Flux of Diffusing Component A for Equimolar Diffusion with B based on Partial Pressure of A Calculator

Molar Flux Formula:

\[ N_A = \frac{D_{AB}}{R \cdot T \cdot \delta} \cdot (P_{A1} - P_{A2}) \]

m²/s
K
m
Pa
Pa

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1. What is Molar Flux of Diffusing Component A?

Definition: Molar flux is the amount of substance (in moles) that passes through a unit area per unit time during diffusion.

Purpose: This calculation is essential in chemical engineering for designing separation processes, reactors, and mass transfer equipment.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ N_A = \frac{D_{AB}}{R \cdot T \cdot \delta} \cdot (P_{A1} - P_{A2}) \]

Where:

Explanation: The formula calculates the molar flux based on Fick's law of diffusion for equimolar counter-diffusion.

3. Importance of Molar Flux Calculation

Details: Accurate molar flux calculations are crucial for designing efficient mass transfer operations in chemical processes.

4. Using the Calculator

Tips: Enter the diffusion coefficient, temperature, film thickness, and partial pressures at both points. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is equimolar counter-diffusion?
A: It's when two components diffuse at equal molar rates in opposite directions, common in binary systems.

Q2: What are typical values for diffusion coefficients?
A: For gases, typically 10⁻⁵ to 10⁻⁴ m²/s; for liquids, 10⁻⁹ to 10⁻¹⁰ m²/s.

Q3: How does temperature affect molar flux?
A: Higher temperature generally increases diffusion coefficient and thus molar flux.

Q4: What is the film thickness in mass transfer?
A: It's the hypothetical stagnant layer where concentration gradients exist.

Q5: Can this calculator be used for liquids?
A: Yes, but ensure proper units (especially for partial pressures which would be replaced by concentrations).

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