1. What is Critical Temperature of Real Gas?

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

Purpose: This calculator determines the critical temperature based on Wohl parameter b, gas pressure, and reduced pressure.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T'_c \) — Critical Temperature (Kelvin)
• \( b \) — Wohl parameter b (empirical parameter)
• \( P_{rg} \) — Pressure of Gas (Pascal)
• \( P_r \) — Reduced Pressure (dimensionless)
• \( [R] \) — Universal gas constant (8.314 J/mol·K)

Explanation: The formula relates the Wohl parameter to the critical temperature through the pressure ratio and universal gas constant.

3. Importance of Critical Temperature

Details: Critical temperature is essential for understanding phase behavior and designing processes involving gases near their critical points.

4. Using the Calculator

Tips: Enter the Wohl parameter b, gas pressure in Pascals, and reduced pressure (dimensionless). All values must be > 0.

5. Frequently Asked Questions (FAQ)

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

Q2: What is reduced pressure?
A: Reduced pressure is the ratio of the actual pressure of the fluid to its critical pressure. It is dimensionless.

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

Q4: What is the typical range for Wohl parameter b?
A: The value depends on the specific gas, but it's typically a small positive number (e.g., 0.001 to 0.1).

Q5: Why is the universal gas constant needed?
A: The constant provides the proper units conversion to yield temperature in Kelvin.