Question: Mass transfer from a bubble. Calculate the mass transfer coefficient for the air-water system for bubbles rising at a gas velocity of (5 mathrm{~cm} /

Mass transfer from a bubble. Calculate the mass transfer coefficient for the air-water system for bubbles rising at a gas velocity of $5 \mathrm{~cm} / \mathrm{s}$ in a pool of stagnant liquid. Use the penetration model for $k_{\mathrm{L}}$.

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