Problem 7.) Determine the diffusivity of ammonia in water at 15C using: (a) the Wilke-Chang equation (b) the Hayduk and Laudie equation Compare the results with the experimental value reported in Appendix J. Table J.2 Binary mass diffusivities in liquids Temperature Solute A Solvent B (K) Chlorine Water 289 Hydrogen Water 273 chloride 283 Ammonia Water Carbon dioxide Water 289 278 288 283 293 291 Water Sodium chloride Solute concentration (g mol/L or kg mol/m) 0.12 9 2 9 2.5 0.5 3.5 1.0 0 0 0.05 0.2 1.0 3.0 5.4 0 1.0 0.01 1.0 3.75 0.05 2.0 0 0 2.0 Diffusivity (cm/s 10% or m/s x 10 1.26 2.7 1.8 3.3 2.5 2.44 1.24 1.77 1.46 1.77 1.26 1.21 1.24 1.36 1.54 1.28 0.82 0.91 0.96 0.50 0.83 0.90 0.77 3.2 1.25 Methanol Acetic acid Water Water 288 285.5 291 283 Ethanol Water n-Butanol Carbon dioxide Chloroform Water Ethanol Ethanol 289 288 290 293 "R. E. Treybal. Mass Transfer Operations, McGraw-Hill, New York, 1955, p. 25