1. What is Partial Pressure by Dalton's Law?

Definition: Partial pressure is the notional pressure of a constituent gas if it alone occupied the entire volume of the original mixture at the same temperature.

Purpose: This calculator helps determine the partial pressure of a gas in a mixture based on its concentration and the total pressure of the system.

2. How Does the Calculator Work?

The calculator uses Dalton's Law formula:

Where:

• \( P_{partial} \) — Partial pressure of the gas (Pascal)
• \( P \) — Total pressure of the gas mixture (Pascal)
• \( c \) — Concentration of the gas (mol/m³)

Explanation: The total pressure is multiplied by the gas concentration to determine its contribution to the overall pressure.

3. Importance of Partial Pressure Calculation

Details: Partial pressure calculations are essential in chemical engineering, respiratory physiology, and industrial gas applications.

4. Using the Calculator

Tips: Enter the total pressure in Pascals and gas concentration in mol/m³. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Dalton's Law of Partial Pressures?
A: It states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of individual gases.

Q2: What units should I use for this calculation?
A: The calculator uses Pascals for pressure and mol/m³ for concentration. Convert your units if necessary.

Q3: Does this work for ideal gases only?
A: The calculation is most accurate for ideal gases, but can approximate real gas behavior under many conditions.

Q4: How is this different from mole fraction calculation?
A: This version uses concentration (mol/m³) rather than mole fraction, making it useful for volume-based applications.

Q5: Can I calculate concentration from partial pressure?
A: Yes, by rearranging the formula: \( c = \frac{P_{partial}}{P} \)