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 Clausius parameter a and temperature parameters.
The calculator uses the formula:
Where:
Explanation: The formula relates critical pressure to temperature ratio and Clausius parameter.
Details: Critical pressure is essential for understanding phase behavior and designing processes involving real gases.
Tips: Enter the temperature of real gas in Kelvin, reduced temperature (dimensionless), and Clausius parameter a. All values must be > 0.
Q1: What is reduced temperature?
A: Reduced temperature is the ratio of the actual temperature to the critical temperature of the substance.
Q2: How do I obtain Clausius parameter a?
A: Clausius parameter a is an empirical parameter characteristic to equation obtained from Clausius model of real gas.
Q3: What units does this calculator use?
A: Temperature must be in Kelvin, and the result is in Pascals (Pa).
Q4: Why is the universal gas constant squared in the formula?
A: The formula derivation involves gas constant terms that result in R² in the final equation.
Q5: Can this be used for any real gas?
A: Yes, as long as you have the appropriate Clausius parameter for the specific gas.