QUESTION 1 (25 MARKS Consider an evaporation from a sphere object with a diameter of 24 mm under 70C and atmospheric pressure condition. Assume the vapor pressure of the object at 70C at 2.0 mm Hg. It was shown that the diffusivity of the object at 20C is 7 * 106 m/s. From your own perspective, discuss whether it is possible to obtain diffusion coefficient for all gases or vapour through experimental studies. 3 Marks C01, POI, C4) Suggest a suitable method to predict the diffusivity coefficient for this case and calculate the diffusivity coefficient using your proposed method (b) 16 Marks C01, POI, C4) State TWO (2) important assumptions in the calculation and calculate the rate of evaporation of the object from the surface in kg.molis.m? [12 Marks [C01, POI, C21 Discuss how temperature and pressure affect the rate of diffusion for liquid and gas. 14 Marks fC01, POI, C5) (d) (d)