1. What is Actual Molar Volume of Real Gas?

Definition: The molar volume of a real gas is the volume occupied by one mole of the gas at a given temperature and pressure, accounting for real gas behavior.

Purpose: This calculator determines the actual molar volume using Wohl's equation parameters, which is essential for thermodynamic calculations involving real gases.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V'm \) — Molar Volume of Real Gas (m³)
• \( V'r \) — Reduced Molar Volume for P-R Method (m³)
• \( b \) — Wohl parameter b (empirical constant)

Explanation: The reduced molar volume is multiplied by four times the Wohl parameter b to obtain the actual molar volume of the real gas.

3. Importance of Molar Volume Calculation

Details: Accurate molar volume calculations are crucial for designing chemical processes, predicting gas behavior, and calculating thermodynamic properties of real gases.

4. Using the Calculator

Tips: Enter the reduced molar volume (in m³) and Wohl parameter b (default value 0.00625). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

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

Q2: How do I find the reduced molar volume?
A: Reduced molar volume can be calculated from critical parameters or obtained from experimental data.

Q3: Why multiply by 4 in the formula?
A: The factor of 4 comes from the relationship between the Wohl parameter b and the actual molecular volume in the equation of state.

Q4: What units should I use?
A: Use consistent units - cubic meters for volume. The calculator assumes SI units.

Q5: Can this be used for all gases?
A: This calculation is specific to gases modeled by the Wohl equation. Different equations of state may require different parameters.