2. (a) Use the kinetic theory expression given in class (also in posted text by BSLK," section 17.7) to estimate a value for the CO2 diffusivity in air at 298 K. Treat the mixture as binary, with the second component being nitrogen. You will need to look up the "collision diameters" dcoz and dn, in the library's on-line Chem NetBase database obtained from the CRC Handbook.? Compare your results to experimental values in Table A.8 of BLID3 at 293K. (b) Estimate the order of magnitude of time Tv,coz it would take for CO2 to diffuse a distance of 1 cm in air at 298K, using your results from part (a). Compare Tv,co, to a similar estimate (Tw.coz) for CO2 dissolved in liquid water at the same temperature, using experimental data in BLID Table A.8 as needed. (c) The protein Q2-macroglobulin has a molecular weight of 820,000 g/mol and a diffusion coefficient in water at 20C of D = 2.41 x 10-7 cm/s (Handbook of Biochemistry and Molecular Biology, CRC Press, 1976). Calculate the Stokes-Einstein radius (or hydrodynamic radius) of this globular protein