Derive an expression for the fall in the liquid level during evaporation using a quasi-steadystate approach. Show
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Derive an expression for the fall in the liquid level during evaporation using a quasi-steadystate approach. Show that
\[\frac{d H}{d t}=\frac{M_{\mathrm{A}}}{ho_{\mathrm{L}}} N_{\mathrm{A}}\]
where \(N_{\mathrm{A}}\) is the instantaneous rate of evaporation, i.e., based on the current height of the vapor space \(H\).
Verify the following expression for the height change:
\[H^{2}-H_{0}^{2}=2 \frac{M_{\mathrm{A}}}{ho_{\mathrm{L}}} D_{\mathrm{A}} C y_{\mathrm{A}, \mathrm{s}} \mathcal{F} t\]
where \(\mathcal{F}\) is the drift correction factor. In this expression we assume that the bulk mole fraction of \(\mathrm{A}\) is zero.
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Related Book For
Advanced Transport Phenomena Analysis Modeling And Computations
ISBN: 9780521762618
1st Edition
Authors: P. A. Ramachandran
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