Chemistry

Juan Waller

13 October, 00:17

The evaporation rate of chloroform (CHCl3) in air has been experimentally measured in an Arnold diffusion cell at 25°C and 1.00 atm. Over a period of 10 hr, the chloroform dropped 0.44 cm from the initial surface 7.40 cm from the top of the tube. The density of liquid chloroform is 1.485 g/cm3 and its vapor pressure at 25°C is 200 mm Hg. 1. Assuming air is an ideal gas, determine the molar concentration of air in mol/cm3. 2. Determine the mole fraction of chloroform in air at the liquid-air interface. 3. Determine the flux of chloroform through the air column in mol / (cm2 s) 4. Determine the diffusion coefficient of chloroform in air in cm2 / s.