Question

Final Exam(1) Accessibility M Carbon tetrachloride (CCl) diffuses at 25°C in a dilute solution of benzene. The experimental diffusivity is: 1.92*10 cm2/s at 25 C. a) Explain using two film theory model the mass transfer of carbon tetrachloride into benzene with the help of a diagram. (2 Marks) b) Select two models to estimate diffusivity coefficient at 25°C. (6 Marks) c) Explain numerically which model gives better prediction and why in terms of assumptions. (2 Marks) Data: Association factor of benzene 1.0 Viscosity of benzene 0.6 cP. Molecular weight of Carbon 12, Molecular weight of Hydrogen 1 Molecular structure for carbon tetrachloride (CCl): (hint: Take the value for carbon mentioned in carbon-hydrogen section) CI C CI CI

Answer 1

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