1. What is Critical Molar Volume using Wohl Equation?

Definition: This calculator determines the critical molar volume of a real gas using the Wohl equation, specifically based on the Wohl parameter b.

Purpose: It helps in thermodynamic calculations and gas property analysis by providing the critical volume per mole of substance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V'_c \) — Critical molar volume (m³/mol)
• \( b \) — Wohl parameter b (specific to the gas)

Explanation: The Wohl parameter b is multiplied by 4 to obtain the critical molar volume according to the Peng-Robinson model.

3. Importance of Critical Molar Volume

Details: Critical molar volume is essential for understanding gas behavior near critical conditions and is used in various thermodynamic equations of state.

4. Using the Calculator

Tips: Enter the Wohl parameter b value (must be > 0). The result will be the critical molar volume in cubic meters per mole.

5. Frequently Asked Questions (FAQ)

Q1: What is the Wohl parameter b?
A: It's an empirical parameter characteristic to the Wohl equation of state for real gases.

Q2: How do I find the Wohl parameter b for a specific gas?
A: It can be derived from experimental data or found in thermodynamic property tables.

Q3: Why is the critical molar volume important?
A: It helps predict gas behavior at critical conditions and is used in phase equilibrium calculations.

Q4: What's the difference between this and ideal gas molar volume?
A: This accounts for real gas behavior, while ideal gas volume assumes no molecular interactions.

Q5: Can this be used for all gases?
A: Yes, but accuracy depends on having the correct Wohl parameter for the specific gas.