Wohl Parameter c Formula:
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Definition: Wohl parameter c is an empirical parameter characteristic to equation obtained from Wohl model of real gas.
Purpose: It's used in thermodynamic equations of state to describe the behavior of real gases, particularly at high pressures.
The calculator uses the formula:
Where:
Explanation: The formula relates the Wohl parameter to the critical properties of a substance.
Details: Accurate calculation of Wohl parameters is essential for precise thermodynamic modeling of real gas behavior, particularly in chemical engineering 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 c?
A: Values vary widely depending on the substance, ranging from very small numbers for simple gases to larger values for complex molecules.
Q2: How accurate is the Wohl equation?
A: The Wohl equation provides reasonable accuracy for many engineering applications, though more complex equations like Peng-Robinson may be more precise.
Q3: Where can I find critical properties for common substances?
A: Critical properties are available in chemical engineering handbooks and thermodynamic databases.
Q4: What units should I use for input?
A: Use Pascals for pressure, Kelvin for temperature, and cubic meters per mole for molar volume.
Q5: Can this calculator be used for mixtures?
A: No, this calculator is for pure substances. Mixtures require additional parameters and mixing rules.