# 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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Question: 29.4

## Awastewater stream is introduced to the top of a mass-transfer tower where it flows countercurrent to an air stream. At one point in the tower, the wastewater stream contains 1 × 10^-3 g mol A/m³ and the air is essentially free of any A. At the operating conditions within the tower, the film ...

At the specified plane, c_{A, L}=1.0 \times...
Question: 29.2

## The Henry’s law constant for oxygen dissolved in water is 4.06 × 10^9 Pa/(mol of O2 per total mol of solution) at 293 K. Determine the solution concentration of oxygen in water that is exposed to dry air at 1.013 × 10^5 Pa and 293 K. ...

At 293 K, the vapor pressure of acetone is ...