Wohl Parameter a Formula:
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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, particularly accounting for intermolecular forces in non-ideal conditions.
The calculator uses the Wohl equation:
Where:
Details: Accurate calculation of Wohl parameters is essential for modeling real gas behavior in chemical engineering, thermodynamics, and industrial processes.
Tips: Enter all required parameters with appropriate units. Default values are provided for reference.
Q1: What are reduced parameters?
A: Reduced parameters are ratios of actual parameters to their critical values (e.g., reduced temperature = T/Tc).
Q2: How do I find reduced parameters?
A: Divide the actual parameter by its critical value for the substance (available in thermodynamic tables).
Q3: What are typical values for Wohl parameters?
A: Parameters vary by substance. For example, for CO2: a ≈ 0.365, b ≈ 0.0427, c ≈ 0.00042.
Q4: When is the Wohl equation most useful?
A: For moderately non-ideal gases at high pressures and low to moderate temperatures.
Q5: What are the limitations of the Wohl equation?
A: It may not be accurate near the critical point or for highly polar gases.