Berthelot Equation Formula:
From: | To: |
Definition: The Berthelot equation is a thermodynamic equation of state that modifies the ideal gas law to account for real gas behavior.
Purpose: It provides more accurate temperature predictions for real gases by considering intermolecular forces and molecular volume.
The calculator uses the Berthelot equation:
Where:
Details: Precise temperature determination is crucial for chemical engineering processes, gas storage, and thermodynamic system design.
Tips: Enter all required parameters. Reduced pressure and molar volume are dimensionless ratios. Critical parameters are substance-specific properties.
Q1: What are reduced properties?
A: Reduced properties are ratios of actual properties to critical properties (Pr = P/Pc, Vr = V/Vc).
Q2: How do I find critical parameters?
A: Critical parameters (Pc, Vc) are tabulated for most substances in thermodynamic reference tables.
Q3: What are typical values for a and b?
A: Berthelot parameters are substance-specific. Parameter a accounts for intermolecular forces, while b accounts for molecular volume.
Q4: When is the Berthelot equation most accurate?
A: It works best for moderate pressures, not too close to the critical point.
Q5: What are the limitations of this equation?
A: Like all two-parameter equations, it becomes less accurate near the critical point and for highly polar gases.