The spreading of a toxic waste that decays in time is often modeled by the diffusion equation dC 82C „ £( , k + C f{t) where a denotes the decay rate and /(x, t) the source strength per unit distance and unit time. Let the domain be 0 < x < L and no flux be permitted at both ends. Initially the concentration is zero everywhere. Find C(x, t) for t > 0 for general /. Discuss the result for the following special source function /: f/is(^) forT, where fo is a constant. Comment on the effect of the decay rate.

Achemical equilibrium between gaseous reactants and products is shown. n2(g) + 3h2(g) ⇌ 2nh3(g) how will the reaction be affected if the pressure on the system is increased? it will shift toward the reactant side as there is lower pressure on the reactant side. it will shift toward the product side as there is higher pressure on the product side. it will shift toward the reactant side as there are a greater number of moles of gas on the reactant side. it will shift toward the product side as there are a fewer number of moles of gas on the product side.