(For Nos 12 to 14). Get the value of diffusivity of butyric acid vapor (A) in air (B) from Perry's ChE Handbook. Assume that this value was estimated from the Fuller-Schettler-Giddings correlation....

Extracted text: (For Nos 12 to 14). Get the value of diffusivity of butyric acid vapor (A) in air (B) from Perry's ChE Handbook. Assume that this value was estimated from the Fuller-Schettler-Giddings correlation. 12. What will be the value of DAB at 50 °C and 1.2 atm in m?/sec? a. 5.025 x 10-6 m2/sec b. 6.700 x 10-6 m?/sec c. 7.493 x 10-6 m2/sec d. 9.366 x 10-6 m2/sec 13. What is the molar flux of A, diffusing in a 1.25-mm film of B at 0 °C and 1 atm if the diffusion follows equimolar counterdiffusion? The mole fraction of A on one side of the film is 0.09; it is 0.009 on the other side. a. 0.0145 mol/m2 sec b. 0.0194 mol/m2 sec c. 0.0217 mol/m2 sec d. 0.0271 mol/m² - sec 14. What is the molar flux of A, diffusing in a 1.25-mm film of B at 0 °C and 1 atm if the diffusion follows unimolar diffusion? The mole fraction of A on one side of the film is 0.19; it is 0.05 on the other side. a. 0.0381 mol/m2 sec b. 0.0426 mol/m2. sec 0.0533 mol/m2 . sec d. 0.0639 mol/m2 sec с.