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

Dalton's Law states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases. This fundamental principle is crucial in gas chemistry and physics.

2. How Does the Calculator Work?

The calculator uses Dalton's Law equation:

Where:

• \( P_{total} \) — Total pressure of the gas mixture (Pa)
• \( P_1, P_2, \dots, P_n \) — Partial pressures of individual gases (Pa)

Explanation: The calculator sums all the partial pressures you input to determine the total pressure of the gas mixture.

3. Importance of Partial Pressure Calculation

Details: Calculating total pressure from partial pressures is essential in respiratory physiology, scuba diving, industrial gas mixtures, and chemical reactions involving gases.

4. Using the Calculator

Tips: Enter all partial pressures separated by commas (e.g., "101325, 25331.25, 5066.25"). The calculator will sum them and show the step-by-step solution.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for pressure?
A: This calculator uses Pascals (Pa), but any consistent pressure unit will work as long as all values use the same unit.

Q2: Does Dalton's Law apply to reacting gases?
A: No, Dalton's Law only applies to mixtures of non-reacting gases. Chemical reactions between gases can change the partial pressures.

Q3: How does temperature affect partial pressures?
A: Temperature changes affect all partial pressures proportionally (via the Ideal Gas Law), but their relative contributions remain the same.

Q4: What's the difference between partial pressure and concentration?
A: Partial pressure depends on both concentration and total pressure, while concentration is simply the amount per volume regardless of pressure.

Q5: Can I use this for vapor pressure calculations?
A: Yes, Dalton's Law applies to vapor pressures in gas mixtures, but remember that vapor pressure depends on temperature.