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 determines the critical pressure using the Clausius equation with actual and critical parameters.
The calculator uses the Clausius equation:
Where:
Details: Critical pressure is essential for understanding phase behavior and designing processes involving real gases at high pressures.
Tips: Enter all parameters in the specified units. Temperature, molar volume, and pressure must be positive values.
Q1: What are typical values for Clausius parameters?
A: Parameters a, b, and c are substance-specific and must be determined experimentally for each gas.
Q2: Why is the universal gas constant used?
A: The universal gas constant relates energy, temperature, and amount of substance in the ideal gas law.
Q3: What's the difference between critical pressure and actual pressure?
A: Critical pressure is a substance property, while actual pressure is the current system pressure.
Q4: Can this calculator be used for all gases?
A: Yes, but accurate results require correct Clausius parameters for the specific gas.
Q5: What happens at the critical point?
A: At the critical point, liquid and gas phases become indistinguishable.