Home Back

Critical Pressure of Real Gas given Wohl Parameter c and other Actual and Reduced Parameters Calculator

Critical Pressure Formula:

\[ P_c = \frac{c}{4 \times \left(\frac{T}{T_r}\right)^2 \times \left(\frac{V_m}{V_r}\right)^3} \]

K

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is Critical Pressure of Real Gas?

Definition: Critical pressure is the minimum pressure required to liquefy a substance at its critical temperature.

Purpose: This calculator determines the critical pressure using the Wohl parameter c and other actual and reduced parameters of the gas.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P_c = \frac{c}{4 \times \left(\frac{T}{T_r}\right)^2 \times \left(\frac{V_m}{V_r}\right)^3} \]

Where:

Explanation: The formula relates the Wohl parameter to critical pressure through temperature and volume ratios.

3. Importance of Critical Pressure Calculation

Details: Critical pressure is essential for understanding phase behavior and designing processes involving real gases at high pressures.

4. Using the Calculator

Tips: Enter all required parameters with appropriate units. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

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

Q2: What are reduced parameters?
A: Reduced parameters are the actual properties divided by their critical values (e.g., Tr = T/Tc).

Q3: What units should I use?
A: Use Kelvin for temperature, cubic meters for volume, and the calculator returns pressure in Pascals.

Q4: How accurate is this calculation?
A: Accuracy depends on the Wohl model's suitability for your specific gas and conditions.

Q5: Can I use this for any gas?
A: The Wohl model works best for non-polar or slightly polar gases. For highly polar gases, other models may be more accurate.

Critical Pressure of Real Gas Calculator© - All Rights Reserved 2025