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Question 29.3: In an experimental study of the absorption of ammonia by wat...

In an experimental study of the absorption of ammonia by water in a wetted-wall column, the overall mass-transfer coefficient, K_{\mathrm{G}} was found to be 2.74 \times 10^{-9} \mathrm{~kg} \mathrm{~mol} / \mathrm{m}^2 \cdot \mathrm{s} \cdot \mathrm{Pa}. At one point in thecolumn, the gas  phase contained 8 mol ammonia and the liquid-phase concentration was 0.064 kg mol ammonia/m³ of solution. The tower operated at 293 K and 1.013 \times 10^5 \mathrm{~Pa}. At that temperature, the Henry’s law constant is 1.358 \times 10^3 \mathrm{~Pa} /\left(\mathrm{kg} \mathrm{mol} / \mathrm{m}^3\right). If 85 % of the total resistance to mass transfer is encountered in the gas phase, determine the individual film mass-transfer coefficients and the interfacial compositions.

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