1. What is Critical Temperature of Real Gas?

Definition: Critical Temperature is the highest temperature at which the substance can exist as a liquid. At this temperature, phase boundaries vanish, and the substance can exist both as a liquid and vapor.

Purpose: This calculator determines the critical temperature using the Wohl equation with parameter b, which is useful in thermodynamics and chemical engineering.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T'_c \) — Critical Temperature (Kelvin)
• \( b \) — Wohl parameter b (empirical parameter)
• \( P_c \) — Critical Pressure (Pascal)
• \( [R] \) — Universal gas constant (8.314 J/mol·K)

Explanation: The Wohl parameter b, critical pressure, and universal gas constant are used to calculate the theoretical critical temperature of a real gas.

3. Importance of Critical Temperature Calculation

Details: Knowing the critical temperature is essential for designing chemical processes, storage systems, and understanding phase behavior of substances.

4. Using the Calculator

Tips: Enter the Wohl parameter b and critical pressure in Pascals. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

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

Q2: Where can I find Wohl parameters for specific gases?
A: Wohl parameters are typically found in thermodynamic reference tables or chemical engineering handbooks.

Q3: What units should I use for pressure?
A: The calculator expects pressure in Pascals (Pa). For other units, convert to Pascals first.

Q4: How accurate is this calculation?
A: Accuracy depends on the precision of the input parameters and how well the Wohl equation models the specific gas.

Q5: Can I use this for any gas?
A: The Wohl equation works best for non-polar or slightly polar gases. For highly polar gases, other equations might be more appropriate.