1. What is Critical Temperature of Real Gas using Wohl Equation?

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

Purpose: It helps in thermodynamic analysis and gas property calculations where critical temperature is needed for phase behavior studies.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The Wohl parameter a is divided by six times the critical pressure multiplied by the square of critical molar volume.

3. Importance of Critical Temperature Calculation

Details: Critical temperature is essential for understanding gas behavior, designing chemical processes, and predicting phase transitions.

4. Using the Calculator

Tips: Enter Wohl parameter a, critical pressure in Pascals, and critical molar volume in m³/mol. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What are typical values for Wohl parameter a?
A: Values vary by gas, typically ranging from 0.1 to 10 Pa·m⁶/mol² for common gases.

Q2: Why is critical temperature important?
A: It determines the highest temperature at which a gas can be liquefied by pressure alone.

Q3: How accurate is the Wohl equation?
A: It provides reasonable estimates but may need correction factors for precise calculations.

Q4: Where can I find Wohl parameters for specific gases?
A: In thermodynamic reference books or chemical engineering databases.

Q5: What units should I use for accurate results?
A: Always use SI units: Pascals for pressure and m³/mol for volume.