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 the Wohl equation of state to describe the behavior of real gases, accounting for intermolecular forces and molecular volume.
The calculator uses the formula:
Where:
Details: The Wohl equation provides a more accurate description of real gas behavior compared to the ideal gas law, especially at high pressures and low temperatures.
Tips: Enter all required parameters. Ensure molar volume is greater than parameter b. Temperature must be in Kelvin and pressure in Pascals.
Q1: What are typical values for Wohl parameters?
A: Parameters a, b, and c are substance-specific and must be determined experimentally for each gas.
Q2: When is the Wohl equation most useful?
A: For polar gases and conditions where the ideal gas law fails (high pressure, low temperature).
Q3: What's the relationship between Vm and b?
A: Vm must always be greater than b, as b represents the excluded volume per mole.
Q4: How does temperature affect the calculation?
A: Higher temperatures generally reduce the impact of molecular interactions accounted for by parameter c.
Q5: Can this be used for gas mixtures?
A: Yes, but mixing rules must be applied to determine effective parameters for the mixture.