Critical Pressure Formula:
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Definition: Critical Pressure of Real Gas is the minimum pressure required to liquify a substance at the critical temperature.
Purpose: This calculator helps determine the critical pressure using the Clausius model of real gas behavior.
The calculator uses the formula:
Where:
Explanation: The formula relates critical pressure to critical temperature, volume, and an empirical parameter from the Clausius model.
Details: Critical pressure is essential for understanding phase behavior of substances and designing industrial processes involving gases.
Tips: Enter the critical temperature in Kelvin, Clausius parameter c, and critical volume in cubic meters. All values must be positive.
Q1: What is the Clausius model?
A: An equation of state for real gases that improves upon the ideal gas law by including empirical parameters.
Q2: How do I find critical temperature and volume?
A: These are typically determined experimentally or found in thermodynamic tables for specific substances.
Q3: What are typical values for Clausius parameter c?
A: This varies by substance but is typically a small positive number (often in the range of 0.0001 to 0.1).
Q4: Why is the universal gas constant used?
A: It provides the necessary proportionality between pressure, volume, and temperature in the equation.
Q5: What are common applications of this calculation?
A: Used in chemical engineering, thermodynamics, and process design involving gases near their critical points.