A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids)
A. M (Xo - XF)
B. M (Xo/XF)
C. M ln(Xo/XF)
D. MXo ln(Xo/XF)
Answer: Option D
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How does the Xnod factor is additional in D option?