Diffusion Coefficients: O2
Binary diffusion coefficients for gas-gas, gas-liquid (dissolved gas in water), and liquid-liquid (solute in water) systems — gas-gas D in cm²/s at 1 atm; gas-liquid D in cm²/s (×10⁻⁵ range); liquid-liquid D in m²/s (×10⁻⁹ range); all at or near 25°C reference; per Marrero & Mason, Cussler, Perry's, CRC Handbook
| species A | species B phase T | D cm2 per s (cm2/s) | estimation method | notes | phase | pressure atm (atm) | species B | temperature C (C) |
|---|---|---|---|---|---|---|---|---|
| O2 | N2#gas-gas#25C | 0.181 | experimental | Most common air pair; standard reference | gas-gas | 1 | N2 | 25 |
| O2 | air#gas-gas#25C | 0.176 | experimental | O2 diffusing through air; used in combustion and aeration | gas-gas | 1 | air | 25 |
| O2 | water#gas-liquid#10C | 0.000014 | experimental | Lower temperature O2 diffusion; important for cold water DO calculations | gas-liquid | 1 | water | 10 |
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