1. What is Actual Pressure of Wohl's Real Gas Calculator?

Definition: This calculator computes the actual pressure of a real gas using Wohl's equation of state, incorporating reduced pressure, critical temperature, and critical molar volume.

Purpose: It helps chemical engineers and researchers determine gas pressures under non-ideal conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{gas} \) — Actual pressure of gas (Pascals)
• \( P_{reduced} \) — Reduced pressure (dimensionless)
• \( R \) — Universal gas constant (8.314 J/mol·K)
• \( T_{critical} \) — Critical temperature (Kelvin)
• \( V_{critical} \) — Critical molar volume (m³/mol)

Explanation: The formula relates reduced pressure to actual pressure through critical parameters of the gas.

3. Importance of Accurate Pressure Calculation

Details: Precise pressure calculations are essential for designing chemical processes, predicting phase behavior, and ensuring safety in high-pressure systems.

4. Using the Calculator

Tips: Enter the reduced pressure (dimensionless), critical temperature in Kelvin, and critical molar volume in m³/mol. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is reduced pressure?
A: Reduced pressure is the ratio of actual pressure to critical pressure, making it dimensionless.

Q2: Where can I find critical parameters for gases?
A: Critical temperature and volume are typically available in chemical engineering handbooks or substance property databases.

Q3: Why use Wohl's equation instead of ideal gas law?
A: Wohl's equation accounts for molecular interactions and volume, providing better accuracy for real gases.

Q4: What are typical units for this calculation?
A: Pressure is in Pascals, temperature in Kelvin, and volume in cubic meters per mole.

Q5: Can I use this for any gas?
A: Yes, as long as you have the correct critical parameters for your specific gas.