Actual Pressure of Wohl's Real Gas using other Actual and Reduced Parameters Calculator

Pressure of Gas Formula:

\[ P = P_r \times \left( \frac{4 \times R \times \left( \frac{T}{T_r} \right)}{15 \times \left( \frac{V'}{V'_r} \right)} \right) \]

Pressure of Gas (Pa):

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

Definition: This calculator determines the actual pressure of a real gas using the Wohl equation of state and reduced parameters.

Purpose: It helps in thermodynamics calculations for real gases where ideal gas law assumptions don't apply.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P = P_r \times \left( \frac{4 \times R \times \left( \frac{T}{T_r} \right)}{15 \times \left( \frac{V'}{V'_r} \right)} \right) \]

Where:

\( P \) — Pressure of gas (Pascal)
\( P_r \) — Reduced pressure (dimensionless)
\( R \) — Universal gas constant (8.314 J/mol·K)
\( T \) — Temperature of real gas (Kelvin)
\( T_r \) — Reduced temperature (dimensionless)
\( V' \) — Molar volume of real gas (m³)
\( V'_r \) — Reduced molar volume (m³)

Explanation: The formula relates actual gas pressure to reduced parameters through the Wohl equation of state.

3. Importance of Wohl's Real Gas Calculations

Details: Accurate pressure calculations are essential for designing chemical processes, pipelines, and storage systems for real gases.

4. Using the Calculator

Tips: Enter all required parameters. Reduced parameters are typically obtained from critical properties of the gas.

5. Frequently Asked Questions (FAQ)

Q1: What are reduced parameters?
A: Reduced parameters are actual properties divided by their critical values (P/Pc, T/Tc, V/Vc).

Q2: When should I use Wohl's equation?
A: For real gases at high pressures or low temperatures where ideal gas law fails.

Q3: What's the range of validity for this calculation?
A: It works best for non-polar or slightly polar gases at moderate conditions.

Q4: How accurate is Wohl's equation?
A: It provides reasonable estimates but may need corrections for precise engineering calculations.

Q5: Where can I find reduced parameters for common gases?
A: Thermodynamics reference books or chemical engineering databases provide these values.