Estimate the diffusion coefficient at different temperatures The diffusion coefficient of benzene in dilute aqueous solution at 20C is 1.02 x 10-5 cm/s (Table III.4.A), and the free-air diffusion coefficient of benzene is 0.092 cm/s at 25C (Table II.3.C). Use these reported values to estimate: a. The ratio of diffusion coefficient of benzene in free air and in dilute aqueous solution at 20C b. The free air diffusion coefficient of toluene at 20C Values of Diffusion Coefficients of Selected Compounds in Water Temperature Diffusion coefficient Compound (C) (cm2/s) Acetone 25 1.16 x 10-5 Acetonitrile 15 1.26 x 10-5 Benzene 20 1.02 x 10-5 Benzoic acid 25 1.00 x 10-5 Butanol 15 0.77 x 10-5 Ethylene glycol 25 1.16 x 10-5 Propanol 15 0.87 x 10-5