A 50.0-L tank contains an air?carbon tetrachloride gas mixture at an absolute pressure of 1 atm, a temperature of 34?C, and a relative saturation of 30%. Activated carbon is added to the tank to remove the CCl₄ from the gas by adsorption and the tank is then sealed. The volume of added activated carbon may be assumed negligible in comparison to the tank volume.

(a) Calculate P_CCl4 at the moment the tank is sealed, assuming ideal gas behavior and neglecting adsorption that occurs prior to sealing.

(b) Calculate the total pressure in the tank and the partial pressure of carbon tetrachloride at a point when half of the CCl₄ initially in the tank has been adsorbed. Note: It was shown in Example 6.7-1 that at 34?C where P_CC14 is the partial pressure (mm Hg) of carbon tetrachloride in the gas contacting the carbon.

(c) How much activated carbon must be added to the tank to reduce the mole fraction of CC1₄ in the gas to 0.001?

Transcribed Image Text:

X* CCl4 adsorbed g carbon 0.0762 pccu 1 + 0.096pcci