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, given the Wohl parameter c, critical pressure, and critical temperature.

Purpose: It helps in thermodynamic calculations and understanding the behavior of real gases at critical conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V'c \) — Critical molar volume (m³/mol)
• \( c \) — Wohl parameter c
• \( P,c \) — Critical pressure (Pascal)
• \( T'c \) — Critical temperature (Kelvin)

Explanation: The formula calculates the volume occupied by one mole of gas at its critical point using the Wohl parameter and critical properties.

3. Importance of Critical Molar Volume

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

4. Using the Calculator

Tips: Enter the Wohl parameter c, critical pressure in Pascals, and critical temperature in Kelvin. All values must be > 0.

5. Frequently Asked Questions (FAQ)

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

Q2: How do I find critical pressure and temperature?
A: These are typically available in thermodynamic tables for common substances.

Q3: What units should I use?
A: Pressure must be in Pascals, temperature in Kelvin, and the result is in m³/mol.

Q4: Why is critical molar volume important?
A: It helps predict gas behavior at critical conditions and is used in thermodynamic models.

Q5: Can this be used for all gases?
A: Yes, as long as you have the correct Wohl parameter and critical properties for the gas.