Estimation of liquid diffusivities 

(a) Estimate the diffusivity for a dilute aqueous solution of acetic acid at 12.5°C, using the Wilke-Chang equation, the density of pure acetic acid is 0.937 g/cm³ at its boiling point. 

(b) The diffusivity of a dilute aqueous solution of methanol at 15°C is about 1.28 x 10^-5 cm/s. Estimate the diffusivity for the same solution at 100°C.