CO2

## General Information (more on wikipidia)

 Molecular Weight (g/mol) Density (g/L) Radius (m) Reference Species CO2 44 1600 R [1]

Carbon dioxide is a chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. It is a gas at standard temperature and pressure and exists in Earth's atmosphere as a gas. It is currently at a globally averaged concentration of approximately 385 ppm by volume in the Earth's atmosphere, although this varies both by location and time. Carbon dioxide's chemical formula is CO2.
In general, it is exhaled by animals and utilized by plants during photosynthesis. Additional carbon dioxide is created by the combustion of fossil fuels or vegetable matter, among other chemical processes.

## Diffusion of CO2 in water:

• Alone: $D = 1600\ \mu m^{2} s{-1}$ [1]

## Diffusion of in PBS:

Bibliography
1. J. Crank, "The Mathematics of Diffusion" (Oxford University Press, 1956; 2nd ed. 1976)