Question: A homogeneous reaction in which reactant A is converted into product D occurs in a spherical gel in which catalyst components are uniformly dispersed, and

A homogeneous reaction in which reactant A is converted into product D occurs in a spherical gel in which catalyst components are uniformly dispersed, and in this case, the reaction formula may be represented as -k1cA. In addition, spherical gel is dispersed in water containing a certain concentration of A component (cA). (1) Name three valid assumptions about the above system. Establish a mass balance expression in the control volume inside the gel, and derive the final differential equation expressed for the concentration cA of the A component. (2) Refer to all boundary conditions for solving the differential equation obtained above. (3) Solve the differential equation above to explain how you can find the amount of A component consumed for one hour in a spherical gel when you obtain an analytical solution that represents the concentration distribution of A component as follows. (You just need to explain how to solve the problem without solving it)

cA=cA0coshk1/DABztanhk1/DABcA0sinhk1/DABz cA=cA0coshk1/DABztanhk1/DABcA0sinhk1/DABz

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