Reduced Pressure Formula:
From: | To: |
Definition: Reduced Pressure is the ratio of the actual pressure of the fluid to its critical pressure. It is dimensionless.
Purpose: It helps in the study of real gases using the principle of corresponding states.
The calculator uses the Clausius equation:
Where:
Details: Calculating reduced pressure helps predict the behavior of real gases under various conditions and is essential in thermodynamics and chemical engineering applications.
Tips: Enter all required parameters with appropriate units. Temperature must be in Kelvin, molar volume in cubic meters, and critical pressure in Pascals.
Q1: What is the Clausius equation used for?
A: The Clausius equation is a thermodynamic equation of state used to describe the behavior of real gases.
Q2: Why is reduced pressure dimensionless?
A: Because it's a ratio of two pressures (actual pressure divided by critical pressure), the units cancel out.
Q3: What are typical values for Clausius parameters?
A: These vary by gas. For example, for CO₂: a ≈ 3.592, b ≈ 0.04267, c ≈ 0 (in appropriate units).
Q4: How do I find critical pressure for a substance?
A: Critical pressure is a physical property that can be found in chemical engineering handbooks or material safety data sheets.
Q5: What's the difference between ideal and real gas behavior?
A: Real gases deviate from ideal behavior at high pressures and low temperatures due to intermolecular forces and molecular volume.