(a) Write notes on liquid- liquid Extraction & explain with neat diagram.

(b) A mixture of phenol and water under certain conditions of temperature and composition forms two separate layers, one rich in phenol and the other rich in water. At 300 K, the composition of the upper and lower layers are 70% and 9% by weight of phenol respectively. If 40 g of phenol and 60 g of water are mixed and the layers are allowed to separate at 300 K, what will be the weights of the two layers?

The reverse water-gas reaction is an undesirable side-reaction during industrial hydrogen production:
CO2 + H2 ↔ CO + H2O
(A)What is the equilibrium composition of a mixture at 1500K that initially contained 40 mol. % CO2,
30 mol. % H2, 20 mol. % CO and 10 mol. % H2O? Employ canonical partition functions.
(B) Employ the JANAF table data to find this mixture composition at equilibrium at 1500K and
compare it to the results in part (A). Do they agree? How can one explain the differences?

Calculate the heat flux and overall heat transfer coefficient for two-layer wall, which consists of bricks - l1=0,5 W/(m∙K), and the insulating material - l2=0,05 W/(m∙K). Layer thickness are as follows: s1=0,3, s2=0,2 m, respectively. The temperatures on the outer surface of walls are: bricks t1=10oC, insulation t2 = –5oC. Inside and outside air tempe-ratures are: tin=20oC, and tout= –10oC, respectively.