4. What is the value of P, if the value of A = 10 mole, B = 15 mole, C = 6 mole, D = 8 mole? H

Method of Analysis Solve y′′ − 4y′ + 3y = et/(1 + et) using the method of variation of parameters.

A liquid mixture is made of 15 kg Benzene (MW= 78), 30 kg Toluene (MW=92) and 15 kg Xylene (MW=106) the average molecular weight of this mixture is: Answer:

1. Draw the gas absorption tower with N = 10 (similar to the figure below, but you should draw your own; instead of n or N, you should have actual numbers). Label EACH AND EVERY liquid and vapor streams – flowrates and mole fractions with correct subscripts. 2. Write definitions for the following terms in your own words: V, y, L, x, L, x, V, y., VYNU n-1⁹ n-19 Xa I V₂ Y₂ = YN+1 V₁ = V₁ Ya = y1 Ln-1 Xn-1 Yn Ln Xn +Plate 1 Plate n- Plate n Vn+1 Yn+1 Plate n + 1 Plate N = LN Xb = XN