= SS 29.4 Consider an interphase mass-transfer process for the chlorine dioxide (ClO2)-air-water system at 20 C, where ClO2 gas (solute A) is sparingly soluble in water. At the current conditions of operation, the mole fraction of Clo, in the bulk gas phase is yA = 0.040 and the mole fraction of ClO2 in the bulk liquid phase is XA = 0.00040. The mass density of the liquid phase is 992.3 kg/m3 and is not dependent on the very small amount of Clo, dissolved in it. The molecular weight of water is 18 g/gmole, and the molecular weight of ClO2 is 67.5g/gmole. The total system pressure is 1.5 atm. The liquid film mass- transfer coefficient for ClO2 in water is ky = 1.0 gmole/ma.s, and the gas film mass-transfer coefficient Clo, in air is kg = 0.010 gmole/ma.s.atm. The equilibrium distribution data for the ClO2-water-air system at 20 C are provided below: Pa 1.00E-02 3.00E-02 5.00E-02 7.00E-02 1.00E-01 1.10E-01 XA 2.40E-04 7.19E-04 1.15E-03 1.64E-03 2.34E-03 2.58E-03 PA 1.20E-01 1.30E-01 1.40E-01 1.50E-01 1.60E-01 XA 2.8LE-03 3.06E-03 3.28E-03 3.52E-03 3.78E-03 a. Plot out the equilibrium line in PA AL coordinates, and the operating point (PA, CAL). Is the process gas absorption or liquid stripping? b. What is the equilibrium relationship as m equal to? c. What is k for the liquid film? d. If the Clo, mole fraction in the bulk gas phase is maintained at 0.040 under 1.5 atm total system pressure, what is the maximum possible dissolved C102 concentration (gmole A/m3) in the liquid phase that could possibly exit the processi.e., CAL? e. What are the compositions at the gas-liquid interface, PA,i f. What is Ky, the overall mass-transfer coefficient based upon the overall gas- phase mole fraction driving force? There are several valid approaches for calculating Ky based on the information provided. Show at least two approaches that lead to the same result. g. What is the mass-transfer flux NA for Clo, in units of gmole/ma.s? - C and CAL