Reduced Pressure Formula:
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Definition: Reduced pressure is the ratio of the actual pressure of a fluid to its critical pressure, making it a dimensionless quantity.
Purpose: It's used in thermodynamic equations of state (like Wohl's equation) to describe the behavior of real gases under various conditions.
The calculator uses the formula:
Where:
Explanation: The formula calculates reduced pressure based on actual gas properties and their reduced counterparts.
Details: Reduced properties are crucial for applying corresponding states theory, which allows prediction of a gas's behavior based on its critical properties.
Tips: Enter all required parameters with appropriate units. Default values are provided for reduced temperature and reduced molar volume (both 1).
Q1: What are typical values for reduced pressure?
A: Reduced pressure typically ranges from 0 to 1, where 1 represents the critical pressure.
Q2: Why use reduced properties?
A: Reduced properties allow generalization of gas behavior across different substances using corresponding states principle.
Q3: What's the significance of Wohl's equation?
A: Wohl's equation is a cubic equation of state that describes real gas behavior more accurately than ideal gas law.
Q4: How do I find reduced temperature?
A: Reduced temperature is the actual temperature divided by the critical temperature (Tr = T/Tc).
Q5: What units should I use?
A: Use SI units: Pascals for pressure, Kelvin for temperature, and cubic meters for molar volume.