Berthelot Parameter b Formula:
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Definition: Berthelot parameter b is an empirical parameter characteristic to equation obtained from Berthelot model of real gas.
Purpose: It helps in describing the behavior of real gases by accounting for molecular volume and intermolecular forces.
The calculator uses the formula:
Where:
Explanation: The formula adjusts the ideal gas law to account for real gas behavior through empirical parameters a and b.
Details: Berthelot's equation provides a more accurate description of real gas behavior than the ideal gas law, especially at moderate pressures.
Tips: Enter the molar volume, temperature, pressure, and Berthelot parameter a. All values must be positive (except parameter a which can be zero).
Q1: What are typical values for Berthelot parameters?
A: Parameter a ranges from 0.01 to 10 Pa·m⁶/mol² depending on the gas, while parameter b is typically 10⁻⁵ to 10⁻⁴ m³/mol.
Q2: How does temperature affect parameter b?
A: The calculated b value depends on temperature through the denominator term in the equation.
Q3: What units should I use?
A: Use SI units: m³/mol for volume, K for temperature, Pa for pressure.
Q4: When would I get "undefined" result?
A: This occurs when the denominator becomes zero, which happens at specific combinations of pressure, temperature, and parameter a.
Q5: How is this different from van der Waals equation?
A: Berthelot's equation is similar but uses a temperature-dependent term for parameter a.