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In a stripping process for the removal of TCA from wastewater (very dilute, 50 mg TCA/L), air is bubbled into the water to transfer the TCA from the liquid phase to the gas phase. This process is carried out at 20°C and 1.25 atm. At 20°C, H' = 400 atm when Henry's law is defined by pA = H' xA for the TCA-water system.

a. What would be the Henry's constant based on the mole fractions of TCA in gas and liquid?

b. What is the Henry's constant based on the partial pressure of TCA in the gas phase and the molar concentration of TCA (k mol/m3) in the liquid phase?

c. If kL in the gas film is 0.01 m/s, what is kG? What is ky?

d. If kL in the liquid film is 0.01 m/s, what is kx?

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