Pressure Formula:
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Definition: This calculator computes the actual pressure of a real gas using the Clausius model parameters, critical properties, and reduced pressure.
Purpose: It helps in thermodynamics and chemical engineering calculations for real gas behavior under various conditions.
The calculator uses the formula:
Where:
Explanation: The formula relates the actual pressure to critical parameters and reduced pressure through the Clausius model.
Details: Accurate pressure calculation is crucial for designing chemical processes, predicting phase behavior, and ensuring safety in high-pressure systems.
Tips: Enter the critical temperature in Kelvin, critical volume in m³, Clausius parameter b, and reduced pressure. All values must be positive.
Q1: What is the Clausius parameter b?
A: It's an empirical parameter that accounts for the finite volume occupied by gas molecules in the Clausius equation of state.
Q2: How do I find critical properties?
A: Critical properties are typically available in thermodynamic tables for pure substances.
Q3: What is reduced pressure?
A: Reduced pressure is the ratio of actual pressure to critical pressure (P/Pc), used in corresponding states theory.
Q4: When is this model most accurate?
A: The Clausius model works best for moderately non-ideal gases at conditions not too close to critical point.
Q5: What are typical units for these calculations?
A: SI units are used (Pa for pressure, K for temperature, m³ for volume).