A. Composition varies with axial position.B. There is no axial mixing in the ideal model.C. Every fluid element has the same residence time in the ideal model.D. The reactor is perfectly mixed throughout.
A. Diffusion can be driven by a concentration gradient.B. Fick’s first law relates flux to concentration gradient.C. A larger mass-transfer area can raise transfer rate.D. Diffusivity has units of pressure.
A. Relative volatility affects separation difficulty.B. Reflux can improve separation.C. A reboiler supplies vapour.D. Distillation never requires phase equilibrium data.
