1. What is Reduced Molar Volume for P-R Method?

Definition: Reduced Molar Volume for P-R Method of a fluid is computed from the ideal gas law at the substance's critical pressure and temperature per mole.

Purpose: It helps in understanding and predicting the behavior of real gases under various conditions using the Peng-Robinson equation of state.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V'_r \) — Reduced Molar Volume (dimensionless)
• \( V'_m \) — Molar Volume of Real Gas (m³)
• \( b \) — Wohl parameter b (empirical parameter)

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

3. Importance of Reduced Molar Volume Calculation

Details: Reduced properties are essential for applying corresponding states principles and for comparing different gases under similar conditions.

4. Using the Calculator

Tips: Enter the molar volume of real gas in m³ and the Wohl parameter b. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the Wohl parameter b?
A: Wohl parameter b is an empirical parameter characteristic to equation obtained from Wohl model of real gas.

Q2: What are typical values for Wohl parameter b?
A: The value varies for different substances and must be determined experimentally or from literature.

Q3: What does reduced molar volume represent?
A: It represents the molar volume relative to its value at the critical point.

Q4: Can this calculator be used for any gas?
A: Yes, as long as you have the correct Wohl parameter b for that specific gas.

Q5: What are the units of reduced molar volume?
A: Reduced molar volume is dimensionless as it's a ratio of actual to critical properties.