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A pool of liquid is 10 cm deep, and a gas A dissolves and reacts in the liquid

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A pool of liquid is 10 cm deep, and a gas A dissolves and reacts in the liquid. The solubility of the gas is such that the interfacial concentration is equal to 2 mol/m3 in the liquid and the diffusivity of the dissolved gas is 2 × 10−9 m2/s. Sketch and plot the concentration profile if the gas undergoes a first-order reaction with a rate constant of 10−6 s−1 in the liquid. Repeat the analysis, if instead of being of first order, the reaction were a zeroth-order reaction with a rate constant k0 equal to 10−6 mol/m3 · s. Would you expect a depleted zone (gas-starved region) in the liquid? What should the minimum surface concentration be in order to avoid there being a starved zone?

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