Part E of Example 2-3 determines the differences between Aspen Plus and Example 2-3 results. Explain how the % difference in V is about 4.5 times as the % difference in L yet the numerical differences between V (Aspen Plus value V − Example 2-3 value V) and L (Aspen Plus value L − Example 2.3 value L) have the same absolute values.

Example 2-3

A liquid feed is 25 mol% n-butane, 45 mol% n-pentane, and 30 mol% n-hexane. Feed rate is 1441.3 kmol/h, feed temperature is 70°C, and pressure is 100.0 psia. The adiabatic flash drum operates at 25 psia. Find T_drum, V/F, x_i, y_i, L, and V.