2. (1 pt) Gas-phase and Liquid-phase Diffusivities

Using Welty et al., look up the diffusivity of carbon dioxide in air at T = 273 K and P = 1 atm and 2 atm

and in water at 7 = 283 K and 293 K. Comment on why the following are true: (1) the gas-phase

diffusivities are much larger than the liquid-phase diffusivities, (ii) the gas-phase diffusivity decreases with

increasing pressure, and (iii) the liquid-phase diffusivity increases with temperature (also true of the gas-

phase diffusivity).