1. What is Actual Molar Volume of Real Gas?

Definition: Molar Volume of Real Gas or Molar gas volume is one mole of any gas at a specific temperature and pressure has a fixed volume.

Purpose: This calculator determines the actual molar volume of a real gas using the Wohl equation parameters.

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
• \( b \) — Wohl parameter b (empirical parameter characteristic to equation obtained from Wohl model of real gas)

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

3. Importance of Molar Volume Calculation

Details: Accurate molar volume calculations are essential for gas storage, transportation, and industrial process design where real gas behavior deviates from ideal gas laws.

4. Using the Calculator

Tips: Enter the reduced molar volume and Wohl parameter b (default 0.00625). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Reduced Molar Volume?
A: Reduced Molar Volume is the volume computed from the ideal gas law at the substance's critical pressure and temperature per mole.

Q2: What are typical values for Wohl parameter b?
A: Wohl parameter b is substance-specific, but often falls in the range of 0.001 to 0.1 depending on the gas.

Q3: Why multiply by 4 in the formula?
A: The factor of 4 comes from the relationship between critical parameters and Wohl coefficients in the equation of state.

Q4: How accurate is this calculation?
A: This provides a reasonable estimate for real gases, though accuracy depends on how well the Wohl equation models your specific gas.

Q5: When would I need this calculation?
A: This is useful for chemical engineering calculations, gas storage design, and when working with non-ideal gases under high pressure or low temperature.