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 under various conditions, particularly near critical points.
The calculator uses the formula:
Where:
Explanation: The formula calculates the Wohl parameter a based on critical properties of the gas.
Details: Accurate calculation of Wohl parameters is essential for modeling real gas behavior in chemical engineering and thermodynamics applications.
Tips: Enter the critical pressure in Pascals, critical temperature in Kelvin, and critical molar volume in m³/mol. All values must be > 0.
Q1: What are typical values for Wohl parameter a?
A: Values vary significantly depending on the gas, ranging from small values for simple gases to larger values for complex molecules.
Q2: How does Wohl parameter a affect gas behavior?
A: It accounts for attractive forces between gas molecules in the Wohl equation of state.
Q3: What's the difference between Wohl and Peng-Robinson models?
A: Both are equations of state for real gases, but they use different parameterizations and are accurate in different regimes.
Q4: Where can I find critical parameters for common gases?
A: Critical parameters are typically available in chemical engineering handbooks or thermodynamic databases.
Q5: What units should I use for input values?
A: Use Pascals for pressure, Kelvin for temperature, and cubic meters per mole for molar volume.