Temperature of a liquid and solubility of a gas

AI Thread Summary
The discussion centers on the relationship between temperature and the solubility of gases in water, highlighting that solubility typically decreases as temperature rises. Specifically, it notes that as water temperature increases from 0°C to around 30°C, the solubility of a gas can decrease significantly, potentially halving. Participants emphasize that while there isn't a single formula to predict solubility accurately across all gases, empirical data fitting is necessary. The conversation also touches on factors influencing gas solubility, such as molecular characteristics and diffusion rates, with CO2 being highlighted for its higher solubility despite a lower diffusion rate compared to O2. Overall, the need for specific data and measurements is underscored in understanding gas solubility in relation to temperature.
nautica
I am looking for a formula that would relate temperature and solubility of a gas.

I know that solubility has an inverse relationship and I also know that as the temperature of water increases from 0 C to around 30 C, the solubility of a gas in the water decreases to about half.

Surely there is a formula that is more accurate than this.

Thanks
nautica
 
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Also, what would make one gas be more soluble than another.

For examplle the diffusion rate of CO2 is .86 that of O2, given that rate is inversly porportional to the square root of the molar mass. But, CO2 appears to be diffusion faster b/c it is more soluble.

thanks
Nautica
 
^^^^^^^^^^^^^^^^^^^^^^
 
Two phase mixture equilibria? No "formula." Measure and fit the data. Solubilities can increase or decrease with temperature (He is an example). Is there something more specific you're seeking?
 

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