Wohl Parameter (a) of Real Gas using Actual and Reduced Parameters Calculator

Wohl Parameter Formula:

\[ a = 6 \times \frac{P_{gas}}{P_{reduced}} \times \frac{T_{gas}}{T_{reduced}} \times \left(\frac{V_{molar}}{V_{reduced}}\right)^2 \]

Pressure of Gas (P_gas):

Reduced Pressure (P_reduced):

Temperature of Real Gas (T_gas):

Reduced Temperature (T_reduced):

Molar Volume of Real Gas (V_molar):

m³

Reduced Molar Volume (V_reduced):

m³

Wohl Parameter (a):

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1. What is Wohl Parameter (a)?

Definition: Wohl parameter a is an empirical parameter characteristic to equation obtained from Wohl model of real gas.

Purpose: It helps in describing the behavior of real gases, accounting for intermolecular forces that the ideal gas law doesn't consider.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ a = 6 \times \frac{P_{gas}}{P_{reduced}} \times \frac{T_{gas}}{T_{reduced}} \times \left(\frac{V_{molar}}{V_{reduced}}\right)^2 \]

Where:

\( a \) — Wohl parameter (dimensionless)
\( P_{gas} \) — Pressure of the gas (Pascals)
\( P_{reduced} \) — Reduced pressure (dimensionless)
\( T_{gas} \) — Temperature of real gas (Kelvin)
\( T_{reduced} \) — Reduced temperature (dimensionless)
\( V_{molar} \) — Molar volume of real gas (m³)
\( V_{reduced} \) — Reduced molar volume (m³)

Explanation: The formula relates the actual gas parameters to their reduced counterparts to calculate the Wohl parameter a.

3. Importance of Wohl Parameter

Details: The Wohl parameters are crucial for accurate modeling of real gas behavior, especially at high pressures or low temperatures where gases deviate from ideal behavior.

4. Using the Calculator

Tips: Enter all required parameters in their respective units. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are reduced properties?
A: Reduced properties are the actual properties divided by their critical values (e.g., reduced pressure = P/P_critical).

Q2: Why is the Wohl parameter important?
A: It helps correct the ideal gas law for real gas behavior, accounting for molecular size and intermolecular forces.

Q3: What are typical values for Wohl parameter a?
A: Values vary by gas but are typically determined experimentally for each substance.

Q4: How do I find reduced properties?
A: Reduced properties are calculated by dividing the actual property by its critical value for the substance.

Q5: Can this be used for any gas?
A: Yes, but accuracy depends on having correct reduced parameters for the specific gas.