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

Definition: Reduced pressure is the ratio of the actual pressure of a gas to its critical pressure, used in thermodynamic calculations with real gases.

Purpose: It helps in applying corresponding states principle to predict properties of real gases using reduced parameters.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_r \) — Reduced pressure (dimensionless)
• \( P_{gas} \) — Actual pressure of the gas (Pascal)
• \( R \) — Universal gas constant (8.314 J/mol·K)
• \( T'_c \) — Critical temperature (Kelvin)
• \( V'_c \) — Critical molar volume (m³/mol)

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

3. Importance of Reduced Pressure Calculation

Details: Reduced properties are essential for applying the principle of corresponding states, which allows prediction of gas behavior based on critical parameters.

4. Using the Calculator

Tips: Enter the actual gas pressure, critical temperature, and critical molar volume. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the range for reduced pressure?
A: Reduced pressure typically ranges from 0 to 1, where 1 represents the critical pressure.

Q2: Why use reduced parameters?
A: Reduced parameters allow comparison of different gases at similar thermodynamic states.

Q3: What's a typical critical temperature range?
A: Critical temperatures vary widely, from 33K for hydrogen to 647K for water.

Q4: How accurate is this calculation?
A: Accuracy depends on the input values and how well the gas follows Wohl's equation of state.

Q5: Can I use this for any gas?
A: This is specifically for gases following Wohl's model. Different models may require different formulas.