Critical Pressure Formula:
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Definition: This calculator determines the critical pressure of a real gas using the Clausius equation with reduced and critical parameters.
Purpose: It helps in thermodynamic calculations and understanding gas behavior near critical conditions.
The calculator uses the Clausius equation:
Where:
Details: Critical pressure is essential for understanding phase behavior, designing chemical processes, and predicting gas-liquid transitions.
Tips: Enter all required parameters. Reduced parameters are dimensionless. Critical temperature is in Kelvin, and critical molar volume is in m³/mol.
Q1: What are reduced parameters?
A: Reduced parameters are ratios of actual values to critical values (e.g., Tr = T/Tc).
Q2: How do I obtain Clausius parameters?
A: These are empirical parameters specific to each gas, typically found in thermodynamic tables.
Q3: What units does this calculator use?
A: The result is in Pascals (Pa). Inputs should be in consistent units as described.
Q4: Why use the Clausius equation?
A: It provides better accuracy for real gases compared to ideal gas law, especially near critical conditions.
Q5: What's the range of validity?
A: The equation works best near critical conditions but accuracy decreases far from these points.