1. What is Actual Pressure of Real Gas Calculator?

Definition: This calculator determines the actual pressure of a real gas using its reduced pressure and critical pressure.

Purpose: It helps in thermodynamics calculations where real gas behavior needs to be analyzed, particularly in chemical engineering and physical chemistry applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( p \) — Actual pressure (Pascal)
• \( P_r \) — Reduced pressure (dimensionless)
• \( P'_c \) — Critical pressure of real gas (Pascal)

Explanation: The actual pressure is calculated by multiplying the reduced pressure (a dimensionless ratio) by the critical pressure of the gas.

3. Importance of Pressure Calculation

Details: Accurate pressure calculation is essential for designing chemical processes, predicting phase behavior, and ensuring safety in high-pressure systems.

4. Using the Calculator

Tips: Enter the reduced pressure (dimensionless) and critical pressure of the gas (in Pascals). 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 to the critical pressure of the substance (P_r = p/P_c).

Q2: How do I find critical pressure?
A: Critical pressure is a property of each substance and can be found in thermodynamic tables or chemical databases.

Q3: Why use reduced pressure in calculations?
A: Reduced properties allow for generalized correlations that work for many substances (law of corresponding states).

Q4: What units should I use?
A: Critical pressure should be in Pascals. Reduced pressure is dimensionless.

Q5: Does this work for ideal gases?
A: This calculator is specifically for real gases which deviate from ideal behavior, especially near the critical point.