1. What is Critical Pressure using Wohl Equation?

Definition: This calculator determines the critical pressure of a real gas using the Wohl equation with parameter b.

Purpose: Critical pressure is essential for understanding phase behavior and designing processes involving real gases.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_c \) — Critical Pressure (Pascal)
• \( [R] \) — Universal gas constant (8.314 J/mol·K)
• \( T_c \) — Critical Temperature (Kelvin)
• \( b \) — Wohl parameter b (empirical parameter)

Explanation: The formula relates critical pressure to critical temperature and the Wohl parameter b.

3. Importance of Critical Pressure Calculation

Details: Critical pressure is crucial for phase equilibrium calculations, process design, and understanding gas behavior under extreme conditions.

4. Using the Calculator

Tips: Enter the critical temperature in Kelvin and Wohl parameter b. Both values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is the Wohl equation?
A: The Wohl equation is a cubic equation of state used to model the behavior of real gases.

Q2: How do I determine Wohl parameter b?
A: Parameter b is typically determined experimentally or from critical property data.

Q3: What units does this calculator use?
A: Temperature must be in Kelvin, and the result is in Pascals.

Q4: Can this be used for any gas?
A: Yes, as long as you have the correct Wohl parameter for the specific gas.

Q5: What's the significance of the 15 in the denominator?
A: This is a constant in the Wohl equation relating critical properties to the parameters.