The diffusivity of chloroform (CHC13) in the air at 298 K and 100 Kpa is measured by Winkelmann's method. The fall in level is reported against time as given below 0 24 56 190 550 1065 1820 2775 3810 Time (min) Level, (mm) 02 4 10 20 30 40 50 60 5040 6480 70 80 The concentration of CHCl3 at the surface of the tube may be assumed zero. The density of chloroform liquid is 1485 kg/m and the vapor pressure of chloroform at 298 K is 26 kPa. Find the diffusivity of CHCl3 in the air