plz help w all Temperature8070605040III-||0.2 0.4 0.6ZA0.8 QUESTION 4The following is a temperature-composition Liquid-vapor phase diagram of a binary system A-B, where ZA refers to the mole fraction of component A in themixture.Please answer the following questions according to the instructions.(a) stable vapor phase exists in which area? (choose I, II or III) =(b) what is the boiling point of a solution of XA=0.2? Tb (°C, no decimal) =(c) what is the vapor phase mole fraction of A in equilibrium with the solution of XA=0.2? yA (2 decimals) =(d) With two theoretical plates, Estimate the vapor phase mole fraction of A at the top of a factional distillation column? yA (2 decimals) =

Given, T-xy graph, where the temperature lies on Y-axis and mole of liquid, x and vapor phase, y lies on X-axis. The graph is divided into three regions. The are I, II and III. Region-I is the vapor phase, region Ii is the liquid-vapor equilibrium and region-III is the liquid phase.(a) The vapor phase lies on region I. So the correct option is I. Therefore, the required solution is I.(b) Boiling point is defined as the temperature at which solution begins to boil. Draw the vertical line from point z = 0.2 and the line touches the bubble curve at 64°C. Therefore, the required solution is 64°C.(c) We need to calculate the mole fraction of A in the vapor phase. Draw the vertical line from point zA = 0.2 and the line meets the bubble curve at point A. Now draw an horizontal line and the line meets the dew curve at point B. The vertical line from point B towards X-axis meets at yA = 0.6 Therefore, the mole fraction of A in vapor phase is 0.6.(d) We need to calculate the mole fraction of A in vapor phase after two theoretical plates. Draw the two theoretical plates as follows: The 1st stage is AB and the second stage is CD. The mole fraction A in the vapor phase at second stage of distillation is 0.92. Therefore, the required solution is 0.92.