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Partial Pressure Calculator

Chemistry
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Calculates the partial pressure of a gas in a mixture using Dalton's Law of Partial Pressures.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Total Pressure of Gas Mixture and Mole Fraction of Gas in the units shown.

Step 2

Read Partial Pressure of Gas in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Air (Oxygen)

Total Pressure of Gas Mixture: 101.3 kPa; Mole Fraction of Gas: 0.21

Partial Pressure of Gas: 21.273 kPa

Air (Nitrogen)

Total Pressure of Gas Mixture: 101.3 kPa; Mole Fraction of Gas: 0.78

Partial Pressure of Gas: 79.014 kPa

High Pressure Oxygen

Total Pressure of Gas Mixture: 202.6 kPa; Mole Fraction of Gas: 0.95

Partial Pressure of Gas: 192.47 kPa

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