Winn's modification of this equation adds a parameter beta to take fluctuations into account.
Winn's modification of this equation adds a parameter beta to take fluctuations into account. Unlike the Underwood equation, this equation doesn't assume the Lewis hypothesis of equal flows within sections, and a form of this equation used in gas chromatography has a product of vapor pressure ratios, and is derived from applying Raoult's and Dalton's law to a series of condensation cycles. One approximation sets alpha equal to the geometric mean of the volatilities of the heavy and light keys. Its denominator contains the logarithm of the average volatility, and the numerator has the product of an expression involving the mole fractions of the product. Used alongside the McCabe-Thiele method, for 10 points, name this equation which gives the theoretical minimum plate number of a fractional distillation process under total reflux.
Winn's modification of this equation adds a parameter beta to take fluctuations into account.
{Fenske} equation