Home work 1 Q1. Consider a component A is diffusing at steady state through a circular conduit which is tapered Z in the conduit, A is diffusing through stagnant, non-diffusing B. Derive an equation of the total uniformly as shown in the Figure below. At point I the radius is ri and at point 2 it is r2. At position flux passed on the following equation as starting point? ΓΙ 1 -NA 2 2 N₁₁ = - DAB PA RT dz P PA (NA + NB) Q2. Suppose water in the bottom of a narrow metal tube is held at constant temperature T-298 K. The total pressure of air (assumed dry) is P-101 kPa, and the temperature is T-298 K. Water evaporates and diffuses through the air, as shown in Figure 2.4. As diffusion proceeds, the level drops slowly. At any time t, the steady state Equation holds. Find the time needed to empty the sylinder if the Z-Zo-10 cm? ZE Zo Z (Z₂-Z1) 2