Critical Pressure of Real Gas using Actual and Reduced Pressure Calculator

Critical Pressure Formula:

\[ P_{CP} = \frac{p}{P_r} \]

Critical Pressure (P_CP): Pa

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1. What is Critical Pressure of Real Gas?

Definition: Critical Pressure given RP is the minimum pressure required to liquify a substance at the critical temperature.

Purpose: This calculator helps determine the critical pressure of a real gas using its actual pressure and reduced pressure value.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P_{CP} = \frac{p}{P_r} \]

Where:

\( P_{CP} \) — Critical Pressure (Pascal)
\( p \) — Actual Pressure (Pascal)
\( P_r \) — Reduced Pressure (dimensionless)

Explanation: The actual pressure is divided by the reduced pressure to obtain the critical pressure of the substance.

3. Importance of Critical Pressure Calculation

Details: Critical pressure is essential for understanding phase behavior of substances and designing industrial processes involving gases near their critical points.

4. Using the Calculator

Tips: Enter the actual pressure in Pascals and the reduced pressure (dimensionless). Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is reduced pressure?
A: Reduced Pressure is the ratio of the actual pressure of the fluid to its critical pressure. It is dimensionless.

Q2: What are typical values for reduced pressure?
A: Reduced pressure typically ranges from 0 to 1, where 1 represents the critical pressure.

Q3: Why is critical pressure important?
A: It helps determine the conditions under which a gas can be liquefied and is crucial for phase equilibrium calculations.

Q4: Can this calculator be used for any gas?
A: Yes, as long as you have the actual pressure and reduced pressure values for the gas.

Q5: What units does this calculator use?
A: The calculator uses Pascals (Pa) for pressure inputs and outputs.