Pressure Formula:
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Definition: This calculator determines the actual pressure of a real gas using the Clausius equation of state, incorporating critical temperature, Clausius parameter a, and reduced pressure.
Purpose: It helps in thermodynamic calculations for real gases where ideal gas laws are insufficient.
The calculator uses the formula:
Where:
Explanation: The formula relates the actual pressure to the reduced pressure through critical parameters and substance-specific constants.
Details: Accurate pressure calculations are essential for designing chemical processes, predicting phase behavior, and ensuring safety in high-pressure systems.
Tips: Enter the critical temperature in Kelvin, Clausius parameter a, and reduced pressure. All values must be positive.
Q1: What is reduced pressure?
A: Reduced pressure is the ratio of actual pressure to critical pressure (P/Pc), a dimensionless quantity.
Q2: How do I find Clausius parameter a?
A: Clausius parameter a is typically determined experimentally from P-V-T data for the specific gas.
Q3: What units does this calculator use?
A: The calculator uses Kelvin for temperature and returns pressure in Pascals (Pa).
Q4: Can I use this for any gas?
A: Yes, as long as you have the correct critical parameters and Clausius parameters for your specific gas.
Q5: Why is critical temperature important?
A: Critical temperature defines the highest temperature at which a gas can be liquefied by pressure alone.