1. What is Reduced Pressure of Real Gas?

Definition: Reduced Pressure is the ratio of the actual pressure of the fluid to its critical pressure. It is dimensionless.

Purpose: This calculator determines the reduced pressure using the Wohl equation parameters.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_r \) — Reduced Pressure (dimensionless)
• \( P_{gas} \) — Pressure of Gas (Pascal)
• \( [R] \) — Universal gas constant (8.314 J/mol·K)
• \( T_{real} \) — Temperature of Real Gas (Kelvin)
• \( T_r \) — Reduced Temperature (dimensionless)
• \( b \) — Wohl parameter b (empirical constant)

3. Importance of Reduced Pressure Calculation

Details: Reduced properties are useful in thermodynamic calculations and help predict gas behavior under different conditions.

4. Using the Calculator

Tips: Enter the gas pressure, temperature, reduced temperature, and Wohl parameter b. All values must be > 0.

5. Frequently Asked Questions (FAQ)

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

Q2: What are typical values for Wohl parameter b?
A: Values typically range from 0.001 to 0.1, depending on the gas.

Q3: What is reduced temperature?
A: It's the ratio of the actual temperature to the critical temperature of the substance.

Q4: Why use reduced properties?
A: They allow for generalized correlations that work for many substances.

Q5: What's the significance of the universal gas constant?
A: It's a fundamental physical constant that appears in many gas equations.