a) dt b) c) d) The general differential equation, d.ca - NA + R, is universally applicable to all mass transport systems. A heterogenous chemical reaction takes place throughout a phase along the diffusion path. For the same Xp, m, and n values in the Heisler charts, the Y value is lower in the sphere chart than in the cylinder chart. In 1D unsteady state diffusion along Z-axis, the semi-infinite medium assumption is valid when the diffusion length scale satisfies the condition: L > 4./DaBt Permeability of a molecule A into a membrane is inversely proportional to the partition coefficient of A into the membrane. In unsteady state transport, only the first order chemical reaction assumption can be applied. A high partial pressure of CO2 causes hemoglobin to unload oxygen, so there is a right shift of the oxygen dissociation curve. e) f)