# Does CO2 float?

• B
This may sounds like a stupid question but...

If you were to use a subsea lifting bag filled with O2 it would rise to the surface.

Would the same happen with CO2? I assume the density of CO2 is different so the amount required would be more or less than O2, but it is still less dense than water so should rise?

Thanks

Edit:

After looking on google I can see that CO2 is 1.824 Kg/m3 whereas O2 is 1.331 Kg/m3. So you would therefore need 37% more CO2 to lift the same mass using O2.

Is that correct?

Thanks

• Xilus

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jbriggs444
Homework Helper
2019 Award
After looking on google I can see that CO2 is 1.824 Kg/m3 whereas O2 is 1.331 Kg/m3. So you would therefore need 37% more CO2 to lift the same mass using O2.

Is that correct?
No, it is not correct.
What is the density of water and how does that figure in?

sophiecentaur
Gold Member
There is a similar question, comparing Hydrogen and Helium for lifting power of balloons.