1. What is Saturation Vapor Pressure?

Definition: Saturation Vapor Pressure is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases at a given temperature in a closed system.

Purpose: This calculator helps determine the saturation vapor pressure using reduced and critical saturation vapor pressure values.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{sat} \) — Saturation Vapor Pressure (Pascal)
• \( P_{rsat} \) — Reduced saturation vapor pressure
• \( P_{csat} \) — Critical saturation vapor pressure (Pascal)

Explanation: The reduced saturation vapor pressure is multiplied by the critical saturation vapor pressure to obtain the actual saturation vapor pressure.

3. Importance of Saturation Vapor Pressure Calculation

Details: Understanding saturation vapor pressure is crucial in meteorology, chemical engineering, and thermodynamics for predicting phase changes and equilibrium conditions.

4. Using the Calculator

Tips: Enter the reduced saturation vapor pressure (dimensionless ratio) and critical saturation vapor pressure in Pascals. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is reduced saturation vapor pressure?
A: It's the ratio of actual saturation vapor pressure to critical saturation vapor pressure.

Q2: What's a typical critical saturation vapor pressure?
A: This varies by substance. For water, it's about 22.06 MPa at the critical point.

Q3: When would I need to calculate saturation vapor pressure?
A: When designing HVAC systems, predicting weather patterns, or working with phase equilibria in chemical processes.

Q4: How do I find the reduced saturation vapor pressure?
A: It can be calculated from temperature and substance properties using appropriate equations of state.

Q5: Does this calculation work for all substances?
A: Yes, as long as you have the correct reduced and critical values for the specific substance.